When analyzing panel data using regression models, it is often reasonable to allow for time-varying covariate effects. We propose a novel approach to modelling timevarying coefficients in panel data regressions, which is based on penalized regression techniques. To illustrate the usefulness of...

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The paper demonstrates how trade between developing countries can cause the divergence of long-run growth among these countries. The model describes two symmetric countries trading with each other and the industrial rest of the world. Bilateral trade occurs at any moment if the countries have...

A main component of customs unions is a common trade policy on imports from non-member countries. Trade policy covers both tariff and non-tariff barriers like trade procedures. We argue that since trade procedures vary markedly across EU countries, the EU is not, strictly speaking, a customs...

An important issue in the debate on voucher systems and school choice is what effects competition from independent schools will have on public schools. Sweden has made a radical reform of its system for financing schools. Independent and public schools operate on close to equal terms under a...

Several recent articles claim that pre-tax income equlity promotes growth. Equality is argued to dampen demand for redistributive economic policies that tax returns to growth-enhancing activities such as investment. These results rest heavly on the assumption that pre-tax income equality is an...

This paper builds a theory of the shape of the distribution of total-factor productivity (TFP) across countries. The data on productivity suggests vast differences across countries, and arguably even has “twin peaks”. The theory proposed here is consistent with vast differences in long-run...

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