In countries, such as Singapore, that have implemented vehicle congestion policies, recent years have seen a shift towards motor vehicle taxes based on car use. Ownership taxes reduce the number of cars on the road, leaving the price per trip largely unaffected. Use taxes such as fuel taxes and...

This paper considers causal inference and sample selection bias in non-experimental settings in which: (i) few units in the non-experimental comparison group are comparable to the treatment units, and (ii) selecting a subset of comparison units similar to the treatment units is difficult because...

This paper uses propensity score methods to address the question: how well can an observational study estimate the treatment impact of a program? Using data from Lalonde's (1986) influential evaluation of non-experimental methods, we demonstrate that propensity score methods succeed in...

This paper discusses the likely evolution of the trade and environment issue in the World Trade Organization after the upcoming ministerial meeting in Singapore this December. It makes a number of points. Progress within the GATT/WTO on this issue looks likely to be slow and painfully...

This paper emphasizes the range of factors which enter country calculations to seek regional trading arrangements. These include conventional access benefits, but extend to safe haven concerns, the use of trade arrangements to underpin security arrangements, and tactical interplay between...

This paper documents recent external sector liberalization in developing countries, evaluates what is behind it, and assesses whether it is likely to persist, accelerate or reverse itself. It draws heavily upon material collected during a recent Ford Foundation-supported research project on...

This paper assesses the impact thus far that the termination of trade restrictions under the Multi Fibre Arrangement (MFA) which up to the end of 2004 applied to exports of clothing and textiles in key OECD markets has had on Asian suppliers. The speculation prior to MFA termination had been...

This paper discusses the potential impacts of services trade liberalization on developing countries and reviews existing quantitative studies. Its purpose is to distill themes from current literature rather than to advocate specific policy changes. The picture emerging is one of valiant attempts...

This paper documents and assesses the significance of the policy changes in China that WTO accession implies in 3 key service categories (banking, insurance, and telecoms), asking whether it is likely they will really be fully implemented in their entirety as undertaken at signature in 2002....

I discuss the tax treatment of transborder capital income, focussing on prevailing arrangements rather than de novo design of optimal tax arrangements. These comprise unilateral reliefs from double taxation under credit or exemption systems, and treaty reliefs (largely following the OECD model...