On the basis of a comparative study of 23 episodes involving commodity price shocks we find that both the public and private sectors typically save around half of a windfall gain resulting from a price rise. We argue that private windfalls should be left with the private sector rather than taxed. The focus of policy towards windfalls should be monetary rather than fiscal. The central bank should accommodate aggregate changes in the demand for financial assets. The private sector will initially wish to increase its claims on the central bank as it saves the windfall, but will then reduce them as portfolios are switched into real assets.
An improvement in the quality of public expenditures is needed in many countries, given binding macroeconomic and fiscal constraints, and poverty reduction and distributional objectives. This process involves a reassessment of methodology used for this purpose by countries and international agencies, and the data needed for improved decision making. This paper reviews methods that might be used by international agencies, such as the Fund and the Bank, jointly with a survey of data currently available, required improvements in the data currently available, and required improvements in the information base. The scope for improvements in governments' expenditure policy making is also considered.