Despite the attention lavished on it by generations of scholars, the question of why the pre-1914 gold standard operated so smoothly for so long remains stubbornly unresolved. Under the gold standard, the exchange rates of the major industrial countries were firmly pegged within narrow bands (“the gold points”) in an environment free of significant restrictions on international flows of financial capital. This is precisely the sort of international monetary arrangement that recent experience suggests should be fragile, precarious and difficult to maintain. The breakdown of the Bretton Woods System following the liberalization of international capital markets in the 1960s and the collapse of the narrow-band European Monetary System on the heels of the removal of Europe’s residual capital controls in the 1980s illustrate the point. How the pre-1914 gold standard managed to avoid the same fate constitutes an analytical mystery and an important policy question.
The literature on this subject can be separated into two strands concerned with the policy regime and with the structure of markets, respectively. The former focuses on the stabilizing nature of the policy rules followed by central banks and governments during the gold standard years. Eichengreen (1992), for example, focuses on credibility and cooperation as the dual pillars of the policy regime. At the core of the system—in Britain, France and Germany—there was no doubt, barring the most exceptional circumstances, that whatever steps were needed would be taken to defend the central bank’s gold reserves and the exchange rate peg. 2/ Lending credibility to this policy was the fact that the connections between policy and employment remained incompletely understood. So long as there was no properly articulated theory of the relationship between policy and the economy, observers could reasonably disagree about whether the level of interest rates was aggravating unemployment; their disagreement neutralized pressures that might have been applied to modify policy. Public spending ratios were low, budgets balanced. Governments “generally abided by a balanced budget objective, which could be regarded, in effect, as representing the required fiscal constraint on national policies” (Goodhart, 1992). Those who suffered most from unemployment were in no position to make their objections felt. The right to vote was generally limited to men of property. Labor parties representing working men were in their formative years. The working man at risk of unemployment when the central bank raised interest rates had little opportunity to voice his objections, much less to expel from office the government and central bankers responsible for the policy.
For all these reasons a negative disturbance to a country’s balance of payments did not weaken the exchange rate to the point where painfully large interest rate increases had to be undertaken. Instead, any weakness was quickly offset by capital inflows prompted by the expectation that the authorities would do what was required to stabilize it. This fact limited the distress caused by those necessary steps.
Another stabilizing element of the policy regime was international cooperation among central banks and governments. Cooperation was episodic, but it occurred precisely when the system’s anchor currencies came under attack. Central banks discounted bills on behalf of the affected country or lent gold to its monetary authority. The most famous such instance was the 1890 Baring Crisis, when the Bank of England was faced with the insolvency of a major British bank, Baring Brothers, which had extended bad loans to the Government of Argentina. The Bank of England borrowed £3 million of gold from the Bank of France and obtained a pledge of £1.5 million of gold coin from Russia. With their help, the exchange rate crisis was surmounted. 3/
Bordo and Kydland (1995) attribute the credibility of policymakers’ commitment to defend their gold standard parities to the contingent nature of the policy rule. In this view, the monetary authorities adhered faithfully to the fixed price of gold except during major disturbances. In the event of a serious disturbance such as a war, however, specie payments could be suspended in order to facilitate the issue of paper money and debt. This relieved the authorities of the need to assume an insupportable—and hence incredible—commitment to defend their fixed parities. But because there was no question about the temporary, emergency nature of the suspension, it did not undermine confidence in the authorities’ commitment to maintain the gold parity in normal times. This contingent rule thus supported a time-consistent and credible monetary regime.
Using a similar approach, Eichengreen (1994a) explains the viability of temporary suspensions in terms of models of exchange rate escape clauses, in which it is argued that exceptional circumstances can be invoked to justify a temporary suspension of the exchange rate peg without undermining the credibility of the authorities’ commitment to defend it in normal times only if those exceptional circumstances are independently verifiable and clearly not of the authorities’ own making. 4/ Given the nature of the policy regime described above, these preconditions were better satisfied under the pre-1914 gold standard than subsequently. Over time, the conduct of policy became increasingly politicized and the viability of the escape clause declined. Temporary suspensions threatened to raise questions about the dedication of governments to the defense of their gold standard parities and to erode the credibility of their commitment to their maintenance. Invocation of the escape clause became rare, and the gold standard increasingly came to resemble a fixed exchange rate system.
Questions nonetheless remain about whether the policy regime can explain the stability of the gold standard system. 5/ Some authors have looked instead to the nature of the underlying economic environment, and to the structure of commodity and factor markets in particular. The maintenance of the gold standard could be attributable simply to a favorable environment (relatively small and infrequent macroeconomic disturbances) or to the flexibility of markets (relatively fast adjustment of prices and quantities to those disturbances which occurred). This strand of literature has been lent new impetus by recent developments in time-series econometrics. A number of investigators (Keating and Nye 1991, Bayoumi and Eichengreen 1992, Bordo 1993) have applied a technique developed by Blanchard and Quah (1989), to extract aggregate-supply and aggregate demand disturbances and speeds of adjustment to shocks from time series on output and prices. These studies generally find that shocks were not smaller and less prevalent under the gold standard than subsequently but that the adjustment of prices and quantities was faster, as if market flexibility allowed disturbances to be more easily accommodated at low cost during the gold standard years.
The framework employed in these studies is the familiar aggregate-supply-aggregate demand model of Figure 1. 6/ It predicts that an aggregate demand disturbance like that depicted in panel (b) will raise output temporarily but prices permanently, while an aggregate supply disturbance like that of panel (c) will raise output and reduce prices in both the short and long runs. The empirical methodology, as described in the appendix, does not impose these price responses. While the price level generally responds as predicted when the model is estimated with data for the Bretton Woods System and the post-Bretton Woods float, the same is not true for the gold standard years. Rather, investigators find a tendency for prices to rise in response to permanent shocks, as if aggregate demand curves sloped up. This raises obvious questions about the applicability of the aggregate-supply-aggregate-demand framework to gold standard experience.
Figure 1The Aggregate Demand and Supply Model
In addition, Neumann (1993), has questioned whether the slopes of the aggregate supply and aggregate demand schedules associated with the variances of the estimated disturbances shift with changes in the exchange rate regime as predicted by the model. Fixed exchange rates like those of the gold standard should be associated with a relatively flat aggregate demand schedule, since domestic prices cannot diverge radically from prices in the rest of the world and the money supply should adjust endogenously to shocks. However, Neumann’s numerical calculations, based on Bordo’s econometric estimates, imply that aggregate demand curves were steeper under Bretton Woods than under floating and only slightly flatter in the gold standard years.
With this debate as background, we reassess the evidence on the incidence of macroeconomic disturbances and the speed of adjustment under the pre-1914 gold standard. Our innovation is to introduce linkages between domestic and foreign prices, further opening up the aggregate-supply-aggregate -demand framework to transactions with the rest of the world. This extension proves sufficient to resolve several of the paradoxes described above. We still find that shocks were no smaller or less frequent under the gold standard than the postwar period, but that the adjustment of prices and quantities was faster. Now, however, we find that on average demand curves slope down over the short and intermediate runs before international arbitrage restores prices to the levels that prevailed prior to the shock. The exceptions are countries like Australia, for which gold discoveries were a major source of disturbances and one with unique implications for the association between supply shocks and the price level.
Finally, we analyze shifts across international monetary regimes in the slopes of the aggregate demand and aggregate supply schedules. We find that these slopes did in fact shift over time in directions consistent with the predictions of standard models. Aggregate demand curves were flatter under the quasi-fixed exchange rates of the gold standard than the pegged but adjustable rates of Bretton Woods and flatter under Bretton Woods than the post-Bretton Woods float. Even the interwar period, which encompassed a succession of different exchange rate regimes, is consistent with this taxonomy. Moreover, short-run aggregate supply curves were steeper under earlier international monetary regimes than later ones, consistent with the notion that nominal inertia increased over time. We show that the steady increase in the slope of the short-run aggregate supply curve provided an incentive for policymakers to adopt monetary regimes featuring progressively greater exchange rate flexibility. This analysis thus provides a unified explanation for the historical evolution of the international monetary system.
II. An Analysis of the Pre-1914 Gold Standard
We gathered data for seven countries for which it was possible to obtain consistent estimates of national income in both real and nominal terms for the 1880-1913 gold standard period: the United States, Great Britain, Germany, Italy, Sweden, Australia and Denmark. 7/ Growth and inflation were calculated as the first difference of the logarithm of real GDP and the implicit GDP deflator, respectively. In each case, we included two lagged values in our bivariate VARs so as to preserve the symmetry of specification across countries (the Schwartz Bayes information criterion generally indicated an optimal lag length of one or two). Chow tests provided little evidence of significant structural shifts across subperiods within the gold standard years.
Table 1 summarizes the variability of the estimated aggregate supply and aggregate demand shocks for different countries and periods. 8/ We construct the international aggregate by first estimating the vector autoregressions on individual country data and then aggregating the results using GDP weights. 9/ SD is the standard deviation of this aggregate series, whereas SD* denotes the GDP-weighted standard deviation of individual country series around the aggregate.
Both demand and supply shocks are larger for Australia than for any other country. There is reason to think that the Australian case is different from that of the other economies in the sample, as we explain below. Both shocks are relatively small in Great Britain, the country at the center of the gold standard system.
The data on the size of aggregate disturbances (SD) indicates a decline over time in the size of demand shocks and an increase in the size of supply shocks after 1890. The dispersion across countries of supply and demand disturbances (SD*) is relatively stable, except for a decrease in the dispersion of demand shocks after 1902. The fall in the size and dispersion of aggregate demand disturbances in our time plausibly reflects the solidification of the gold standard system, while increase in the size of aggregate supply disturbances after 1890 may be associated with the increasing disruptiveness of financial crises in the United States and the reduced efficiency of financial intermediation that they implied.
We use the impulse response functions associated with these regressions to plot the aggregate demand and short-run aggregate supply curves in price-output space. For the aggregate demand curve this is the path traced out by prices and output in response to a supply shock. For the aggregate supply curve it is the line segment marked off by the initial equilibrium on one end and the level of output and prices in the first period following a demand shock on the other end. This is the impact effect of a shift in aggregate demand, which traces out a movement up or down the short-run Table 1 supply curve. The remainder of the adjustment to a demand shock can be thought of as a movement along the new demand curve, with prices rises and demand falling.
The simulated supply and demand schedules are shown in the top half of Figure 2. The left-hand panel shows the schedules themselves, the right-hand panel includes their stylized counterparts. These are derived from estimates using aggregate data for the sum of our seven countries, constructed using 1900 GDP weights. Two features are noteworthy. First, the short-run aggregate supply schedule is quite steep, as if much of the adjustment of prices and quantities to shocks was completed within a year. Second, the aggregate demand curve is upward sloping, confirming the paradoxical finding of previous authors.
Figure 2Alternative Estimates of Gold Standard Model
Various explanations have been advanced for this counterintuitive result. Keating and Nye invoke the Tobin effect, which suggests that demand shocks that cause inflation could induce agents to substitute for capital for money, raising the capital/labor ratio and increasing output permanently. Why this effect should have operated more powerfully in the gold standard period, however, is not clear. (Indeed, the fact that inflation was less likely to be persistent under the gold standard than the fiat money regimes that followed should have weakened the operation of the Tobin effect, other things equal). They mention the possibility that negative demand shocks could have led to a permanent deterioration in levels of human and physical capital, as in recent hysteresis models, although again it is not clear why hysteresis effects should have operated more powerfully before 1914. They suggest that there may have existed multiple equilibria in late-19th century economies, with demand shocks permanently shifting them from one equilibrium to another. Insofar as subsequent reductions in transactions costs facilitated the efforts of agents to coordinate on the superior equilibrium, technological progress could have worked to eliminate the multiplicity problem. Finally, there is the possibility that econometric techniques are incapable of distinguishing highly persistent temporary disturbances from permanent ones when applied to relatively short time series.
Our explanation rests on the importance of arbitrage in international commodity and factor markets during the gold standard years and on the tendency for the money supply to adjust endogenously to shocks. Recall that the aggregate demand curve is traced out by subjecting the system to a permanent (aggregate supply) shock. In a closed economy this would tend to raise output and lower prices as in Panel (c) of Figure 1, tracing out a negatively-sloped demand curve. Under the fixed rates of the gold standard, however, commodity-market arbitrage should have prevented domestic and foreign prices from diverging substantially. If goods produced at home and Table 1 abroad were imperfect substitutes in consumption, some relative price movement was still possible. In the limiting case of perfect substitutability, arbitrage would drive domestic prices back to the level of foreign prices, a process which may take time or, if no unexploited arbitrage profits are assumed to exist (as in McCloskey and Zecher, 1984), instantaneously. The underlying point is that in a commodity standard the money supply will adjust through the balance of payments to restore equilibrium to both asset and commodity markets.
The close connection between prices across countries implied by a commodity standard provides an intuitive explanation for why aggregate supply shocks appear associated with increases in national prices. It is a well-known characteristic of the pre-1914 period that expansions in the world gold stock were associated with both increases in prices and robust levels of world output growth, while declines in prices were associated with more modest overall economic expansion. As prices across countries were closely linked, the estimation results could reflect this association between overall world prices and the level of output. Such a relationship would not be a concern in postwar data as national price levels were not bound together in the long-run in the same manner.
This suggests that the relevant way of measuring the aggregate demand curve during the gold standard is in output/relative price space, where the domestic price level is measured relative to the foreign price level. We re-estimated the same bivariate VARs using domestic output and this relative price variable. The price level is measured relative to the aggregate price level (a GDP weighted aggregate of individual-country price levels). Australia was excluded from the aggregate for reasons we describe momentarily.
The lower panel of Figure 2 shows the results from this decomposition. The aggregate demand curve now slopes down in the short-run, after which domestic prices recover to world levels. In fact, domestic prices more than recover to world levels. An interpretation of this last finding is that many of the positive supply shocks experienced by these industrial economies took the form of declines in the prices of imported primary products, which raised the relative price of manufactured goods in the long run. That the countries (aside from Australia) for which prices do not rise in the long run are Denmark and Italy, the two economies in our sample specializing most heavily in the production of agricultural products, supports this interpretation.
One country for which these adjustments fail to remove the anomaly is Australia, where the aggregate demand curve when plotted in output/relative price space continues to display a positive slope. Australia was more dependent on gold production than any other country in our sample, which may account for the positive price response to aggregate supply shocks. Positive supply shocks which take the form of gold discoveries and increased gold production would have tended to raise prices even in the short run (by raising the amount of gold and hence the amount of money in the economy). From this point of view the persistence of a positive price response to supply shocks is no paradox.
III. Comparisons of the Gold Standard with Other Regimes
A noteworthy feature of the impulse response functions for the pre-1914 gold standard is the combination of a strikingly flat aggregate demand curve with a steep aggregate supply schedule. In this section we contrast these slopes with comparable estimates for subsequent international monetary regimes and advance an explanation for the observed shifts.
We followed the same procedure for the interwar period as for the pre-1914 gold standard, using real GDP and relative price data to estimate bivariate VARs for the United States, Great Britain, Italy, Sweden and Australia for the years 1919-38. 10/ Again, Australia yielded anomalous results, with prices rising in both the short and long runs in response to a positive supply shock. Insofar as money supplies were gold based for much of this period, we are inclined toward the same explanation as before. 11/ For the postwar period, we followed previous work in estimating VARs using output and the domestic price level for each of the G-7 countries, splitting the sample around the time of the breakdown of the Bretton Woods System of pegged exchange rates. The two subperiods were 1955-70 and 1973-88 (with an additional two annual observations to allow for lags). Data were collected from the OECD National Accounts. 12/ We used 1970 GDP weights to construct the international aggregate from the individual country results. 13/
This comparative analysis, summarized in Table 2, lends little support to the hypothesis that disturbances were smaller under the pre-1914 gold standard than subsequent international monetary regimes. Admittedly, the standard deviation of demand shocks to the gold standard aggregate is only about half as large as that to its interwar counterpart, consistent with the view that the gold standard imposed discipline on national economic policymakers. The difference in the ratio of the standard deviations of supply shocks is even larger, about one third as large during the gold standard period as between the wars. The largest shocks are those for the United States, the country whose industrial production declined most dramatically and which suffered the most severe financial crises in the 1930s. Further analysis of the interwar results also suggests a predominance of demand shocks in the 1920s and of supply shocks in the 1930s (Bayoumi and Eichengreen, 1995), consistent with qualitative accounts of the period. Far and away the largest increase in the magnitude of supply shocks occurs in the United States, reflecting the exceptional severity there of the financial crisis and its negative supply-side repercussions through the loss of financial intermediation. 14/
|United States||.024||.050||United States||.016||.018|
|United States||.027||.065||United States||.009||.013|
The picture is very different when extended to the post-World War II years. The average supply shock was over twice as large under the pre-1914 gold standard as under Bretton Woods and the post-Bretton Woods float. Demand shocks, meanwhile, also appear to have been about twice as large under the pre-1914 gold standard. Similarly, the dispersion of supply and demand shocks across countries (SD*) was larger than under either Bretton Woods or the post-Bretton Woods float. There is little support here, in other words, for the notion that the smooth operation of the gold standard, compared to modern international monetary arrangements, reflected the accommodating nature of the underlying environment.
Figure 3 juxtaposes the impulse-response functions for all four periods, together with the stylized supply and demand schedules. There is a clear tendency for short-run aggregate supply curves to become flatter over time and for aggregate demand curves grow steeper. This flattening of supply curves suggests a declining short-run responsiveness of prices to demand shocks, and hence a growing tendency for demand shocks to displace output from long-run equilibrium levels. At the same time, the speed of adjustment along the curves slows over time. This is consistent with evidence presented by some previous investigators (e.g., Cagan 1975, Sachs, 1980), of a tendency for increasing nominal inertia. 15/ The steepening of the demand curve has an obvious interpretation. Under fixed exchange rates domestic prices could not diverge significantly from prices in the rest of the world; as explained above, this meant that supply shocks resulted in a large ratio of output to price responses. By this explanation, the aggregate demand curve should have been flatter under the gold standard, when the exchange rates of the countries in our sample were essentially fixed, than under the Bretton Woods System, when they were pegged but could be adjusted periodically, and flatter under Bretton Woods than under the post-1972 float, when the link between domestic and foreign prices was further relaxed.
Figure 3ADAS Estimates Across Different Regimes
How the interwar period fits into this hierarchy is not clear. The countries in our sample were all back on the gold standard in the second half of the 1920s. Some of them, including the United States and Sweden, return to gold even earlier, while others such as the United Kingdom and Australia behaved as if they had, managing their price levels to shadow those of the gold standard countries even before resuming convertibility. With the breakdown of the gold standard in the 1930s, few countries allowed their exchange rates to float freely. The United States repegged the dollar to gold, Australia joined the sterling area, and France maintained a fixed rate until 1936. While exchange rates were more flexible than under the pre-1914 gold standard, it is not clear how to categorize the interwar period relative to the gold standard years. The short-run aggregate demand curve for this period is clearly flatter than that for Bretton Woods, as if countries attempted to maintain a high degree of exchange rate fixity in the short run, while the long-run aggregate demand curve is nearly as steep as that for Bretton Woods, reflecting the fact that Bretton Woods was in fact characterized by some exchange rate variability over long intervals. 16/
The flattening of the short-run aggregate supply curve and the steepening of the aggregate demand curve may be connected. As the short-run aggregate supply curve becomes flatter, changes in aggregate demand have larger effects on real output in the short-run. As a result, governments have an incentive to adjust policy in a manner more responsive to deviations in real output and less responsive to changes in prices, producing a steeper aggregate demand curve.
These ideas can be illustrated with a small macroeconomic model made up of a welfare function, an aggregate demand curve, an aggregate supply curve, and a monetary reaction function.
|W = - var(y) - αvar(p)||Welfare Function|
|y + βp = ψm||Aggregate Demand|
|y = δp + (l+β)εt||Aggregate Supply|
|m = φ/ψp||Monetary Reaction|
W is welfare, y is output, p is the price level, m is the money supply (which is a proxy for all macroeconomic demand policies), εt is a random aggregate supply disturbance, and α, β, ψ, and φ are coefficients. All variables are measured as deviations from desired levels, and all coefficients (except possibly φ) are positive.
The welfare function says that the government aims to minimize a weighted average of the variance of real output and prices. The aggregate demand function, which can be shifted by changes in macroeconomic policy, incorporates the standard negative relationship between prices and output in the money market, while the aggregate supply curve shows the positive short-run relationship between prices and output in the goods market. Finally, the monetary response function shows the degree to which macroeconomic policy responds to fluctuations in prices.
Consider the response to an aggregate supply shock, εt. In the absence of a monetary response (i.e. if φ=0) this disturbance would raise output by βεt and lower prices by εt. The government chooses the monetary response to such a disturbance, in other words the value of φ. From the aggregate supply curve it follows that a monetary rule will raise prices by φεt and output by φδεt. Hence, output changes by (β+φδ)εt, prices by (φ-l)εt.
Given the welfare function, the optimal φ is that which minimizes:
This value, φ*, is:
φ* depends upon the slope of the aggregate supply curve. If the supply curve is vertical (δ=0), so that policy affects prices but not output, the optimal φ is 1, the value that eliminates the fluctuations in prices. For very large values of δ (i.e. a very flat aggregate supply curve) so that policy only affects output, the optimal φ is -β/δ, the value at which fluctuations in output are minimized. Intermediate values of δ produce responses which take account of both effects.
The slope of the observed aggregate demand curve is the ratio of the responses of output and prices,
It is easy to show that the slope of the aggregate demand curve under optimal government policy is horizontal when the aggregate supply curve is vertical and becomes steeper as the aggregate supply curve becomes flatter. This result obtains even though the welfare function and determinants of aggregate demand remain unchanged. The steepening of the aggregate demand curve is purely a function of the change in the optimal response of policy to disturbances produced by the flattening of the aggregate supply curve.
Clearly, this is a simple model lacking dynamics and taking no account of the fact that private sector responses may themselves change in response to government policy. Still, at a basic level its provides an intuitive explanation for the development of the international monetary system over time. 17/ During the gold standard years, this argument runs, prices were relatively flexible, dampening the impact on output of disturbances even in the short run. With a steep short-run aggregate supply curve preventing output from being significantly displaced from long-run equilibrium levels, economic policy could be keyed to the maintenance of price stability. This was achieved through the operation of a fixed exchange rate regime in which the price level was linked to the rest of the world and largely insulated from domestic disturbances.
With the passage of time, economies came to display growing price inertia, magnifying the impact on output of macroeconomic disturbances. Consequently, policy was increasingly directed toward cushioning the impact of disturbances on output. This required more freedom for governments to pursue policies that might alter the price level; greater exchange rate flexibility was a necessary concomitant of this change in priorities. This trend is evident in the international monetary system’s evolution from the relatively rigid exchange rates of the pre-1914 gold standard to the pegged but adjustable rates of the Bretton Woods System to the increasingly adjustable rates of the post-Bretton Woods float. Our analysis suggests that this evolution was a logical consequence of the growth of nominal rigidities which reduced the capacity of industrial economies to absorb macroeconomic disturbances without experiencing deviations of output and employment from normal levels in the short run.
In this paper we have examined some popular explanations for the smooth operation of the pre-1914 gold standard. Along with the credibility of the policy rules followed by central banks and governments, such explanations focus on potentially stabilizing features of the underlying economic environment, such as the magnitude of disturbances to the participating economies and the latter’s capacity to accommodate supply and demand shocks without suffering costly output and employment fluctuations. Our analysis confirms the findings of previous studies which have rejected explanations for the success of the gold standard based on an absence of destabilizing shocks. Rather, we find that the rapid adjustment of economies to such disturbances played an important role in stabilizing output and employment under the gold standard system.
Our methodological innovation is to introduce into the vector autoregression framework used to analyze these questions arbitrage conditions linking domestic and foreign prices. This extension dispatches several perplexing findings that have emerged from earlier studies. Most notably, it eliminates the paradox of an upward sloping aggregate demand curve in the short and intermediate runs. Rather, it suggests that the aggregate demand curve was extremely flat in the gold standard years, consistent with the predictions of standard models of fixed exchange rate regimes, and that it grew progressively steeper with the evolution of the international monetary system toward greater exchange rate flexibility.
Finally, the simple aggregate-supply-aggregate-demand framework of the paper suggests an explanation for the evolution of the international monetary system. Insofar as we find the short-run aggregate supply curve becoming progressively flatter, implying growing nominal inertia over time, this suggests that governments have had an incentive to opt for regimes permitting greater exchange rate flexibility, since the growth of output fluctuations gives them reason to sacrifice a modicum of price and exchange rate stability in return for freedom to use policy to stabilize output. Thus, the trend toward greater exchange rate flexibility following the gold standard years is a logical response of the change in policy priorities that is itself a consequence of changes in economic structure.
The point of departure for our econometric analysis is the aggregate-supply-aggregate-demand diagram appearing above as Figure 1. We estimate this model using a procedure proposed by Blanchard and Quah (1989), for distinguishing temporary from permanent shocks to a pair of time-series variables. Consider a system where the true model can be represented by an infinite moving average representation of a (vector) of variables, Xt, and an equal number of shocks, εt. Using the lag operator L, this can be written as:
where the matrices Ai represent the impulse response functions of the shocks to the elements of X.
Let Xt be made up of change in output and the change in prices, and let εt be demand and supply shocks. Then the model becomes:
where yt and pt represent the logarithm of output and prices, εdt and εst are independent supply and demand shocks, and a11i represents element a11 in the matrix Ai.
The framework implies that while supply shocks have permanent effects, on the level of output, demand shocks only have temporary effects. (Both have permanent effects upon the level of prices). Since output is written in first difference form, this implies that the cumulative effect of demand shocks on the change in output (Δyt) must be zero. This implies the restriction:
The model defined by equations (A.2) and (A.3) can be estimated using a vector autoregression. Each element of Xt can be regressed on lagged values of all the elements of X. Using B to represent these estimated coefficients, the estimating equation becomes,
where et represents the residuals from the equations in the vector autoregression. In the case being considered, et is comprised of the residuals of a regression of lagged values of Δyt and Δpt on current values of each in turn; these residuals are labeled eyt and ept, respectively.
To convert (A.4) into the model defined by (A.2) and (A.3), the residuals from the VAR, et, must be transformed into demand and supply shocks, εt. Writing et = Cεt, four restrictions are required to define the four elements of the matrix C in the two-by-two case considered. Two are simple normalizations, which define the variance of the shocks εdt and εst. A third comes from assuming that demand and supply shocks are orthogonal.
The final restriction, which uniquely defines the matrix C, is that demand shocks have only temporary effects on output. This implies equation (A.3). In terms of the VAR:
This allows C to be uniquely defined and the demand and supply shocks to identified. Note from equation (A.4) that the long run impact of the shocks on output and prices is equal to (I-B(l))-1. The restriction that the long-run effect of demand shocks on output is zero implies a simple linear restriction on the coefficients of this matrix.
This is where our analysis, based on Blanchard and Quah (1989), differs from other VAR models. The usual decomposition assumes that the variables in the VAR can be ordered such that all the effects which could be attributed to (say) either at or bt are attributed to whichever comes first in the ordering, which is achieved by a Choleski decomposition.
Interpreting shocks with a permanent impact on output as supply disturbances and shocks with only a temporary impact on output as demand disturbances is controversial. Doing so requires adopting the battery of restrictions incorporated into the aggregate-supply-aggregate-demand model. One can think of frameworks other than the standard aggregate-supply-aggregate -demand model in which that association might break down. Moreover, it is conceivable that temporary supply shocks (for example, an oil price increase that is reversed subsequently) or permanent demand shocks (for, example, a permanent increase in government spending which affects real interest rates and related variables) dominate our data. But here a critical feature of our methodology comes into play. While restriction (A.5) affects the response of output to the two shocks, it says nothing about their impact on prices. The aggregate-supply-aggregate-demand model implies that demand shocks should raise prices while supply shocks should lower them. However, these responses are not imposed on the estimation, and hence can be used as an over-identifying restriction to see how well the responses corresponds to those expected from the underlying model.
The Blanchard-Quah procedure has also come in for more general criticism. Lippi and Reichlin (1993), in a comment on the Blanchard-Quah paper, point out that the procedure includes the assumption that the error terms in the model are fundamental, and that nonfundamental representations can give different results. As noted by Blanchard and Quah (1993), in their reply, however, this is a very general issue which is not specific to VAR representations, but covers virtually all dynamic analysis. Hence, while acknowledging that the assumption that the errors are fundamental is important to our procedure, we would note that this is a very general assumption in applied time-series work. On a different tack, Faust and Leeper (1994), discuss the identifying restrictions required for long-run restrictions to provide reliable results, involving the relationship between the long-run behavior and finite horizon data, aggregation across disturbances, and aggregation over time. These issues are clearly important, however, as in the case of Lippi and Reichlin, it remains unclear to us that these problems are peculiar to the structural VAR methodology. Overall, while we agree that it is important to understand the underlying assumptions required to implement a technique, these papers do not convince us that the identifying assumptions required by the Blanchard-Quah approach are significantly different from those used most other applied work.
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International Monetary Fund and University of California at Berkeley, respectively. This paper is forthcoming in Modern Perspectives on the Classical Gold Standard.
Cooperation was repeated subsequently. In 1895 a consortium of European banks, with the encouragement of their governments, defended the U.S. gold standard. In 1898 the Reichsbank and German commercial banks obtained assistance from the Bank of England and the Bank of France. In 1906 and 1907 the Bank of England, confronted by another financial crisis, again obtained support from the Bank of France and from the Reichsbank. The Russian State Bank shipped gold to Berlin to replenish the Reichsbank’s reserves. In 1909 and 1910 the Bank of France again discounted English bills, making gold available to London. Smaller European countries such as Belgium, Norway and Sweden also borrowed reserves from foreign central banks and governments.
For instance, there is Bloomfield’s (1959), seminal article emphasizing central banks’ violations of the rules of the gold standard game.
Blanchard and Quah themselves formulated the model in terms of output and unemployment rather than output and prices. Keating and Nye estimate both variants of the model.
Using the decomposition suggested in Bayoumi (1991).
Results using a decomposition from aggregate data are similar (Bayoumi and Eichengreen, 1995).
Breaks in wartime and during the postwar hyperinflation prevented us from constructing comparable estimates for Denmark and Germany, respectively.
Global gold production rose and fell with the relative price of gold, particularly in the 1930s, and the supply response of the Australian mining industry contributed significantly to this variation.
For additional discussion of the data and results for the post-World War II period, see Bayoumi and Eichengreen (1994).
The aggregate supply and aggregate demand schedules traced out by the impulse-response functions generally accorded with the predictions of the standard model. One exception was France in the post-1972 period, for which neither response had converged toward a new long-run equilibrium level even after 20 years. We therefore exclude France from the post-1972 aggregate plotted below.
Other writers, however, have failed to find increasing wage flexibility over time. For further discussion of the literature surrounding this point, see the chapter by Barry Eichengreen 1995.
These results dissolve the paradox offered by Neumann (1993), since we generate the slopes of the relevant schedules directly on the basis of impulse response functions, rather than inferring them from the variance of output and prices and some auxiliary assumptions.
We intend this story to apply only to the industrial countries whose experience is analyzed above.