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John Cleave

This paper examines the policy implications of structural changes in financial markets. Domestic financial markets have become less segmented, and the major financial centers more integrated. At the same time, the structural changes in financial markets have improved efficiency by lowering intermediation costs, increasing the ability to hedge financial risks associated with currency, interest rate, and price volatility and opening up access to new sources of savings. The widespread application of computer and telecommunications technology to financial markets has permitted markets to process a significantly larger volume of transactions.

Mr. Michael Keen and Mr. Christos Kotsogiannis
This paper explores the role of trade instruments in globally efficient climate policies, focusing on the central issue of whether some form of border tax adjustment (BTA) is warranted when carbon prices differ internationally. It shows that tariff policy has a role in easing cross-country distributional concerns that can make non-uniform carbon pricing efficient and, more particularly, that Pareto-efficiency requires a form of BTA when carbon taxes in some countries are constrained, a special case being identified in which this has the simple structure envisaged in practical policy discusions. It also stresses—a point that has been overlooked in the policy debate—that the efficiency case for BTA depends critically on whether climate policies are pursued by carbon taxation or by cap-and-trade.
Mr. John Norregaard and Ms. Valerie Reppelin
This paper examines the relative merits of two dominant economic instruments for reducing pollution—”green” taxes and tradable permits. Theoretically, the two instruments share many similarities, and on balance, neither seems preferable to the other. In practice, however, most countries have relied more on taxes than on permits to control pollution. The analysis suggests a number of lessons to be learned from country experiences regarding the design and implementation of both instruments. While many, particularly European countries, currently have long-term programs involving environmental taxes, a willingness to experiment with tradable permits seems to be growing, especially given the Kyoto protocol emission targets.