Browsing by Person "Kohler, Wilhelm"

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Can international migration ever be made a Pareto improvement?
(2009) Felbermayr, Gabriel; Kohler, Wilhelm
We argue that compensating losers is more difficult for immigration than for trade and capital movements. While a tax-cum-subsidy mechanism allows the government to turn the gains from trade into a Pareto improvement, the same is not true for the so-called immigration surplus, if the redistributive mechanism is not allowed to discriminate against migrants. We discuss policy conclusions to be drawn from this fundamental asymmetry between migration and other forms of globalization.
Input-output linkages and monopolistic competition : input distortion and optimal policies
(2021) Kohler, Wilhelm; Jung, Benjamin
In this paper, we provide a detailed analysis of a mechanism that distorts production towards too much use of primary factors like labor and too little use of intermediate inputs. The distortion results from two ingredients that are cornerstones of modern quantitative trade theory: monopolistic competition and input-output linkages. The distortion as such is unrelated to trade, but has important consequences for trade policy, including a positive first-order welfare effect from an import subsidy. For a crystal-clear view on the distortion, we first look at it in a single-sector, closed economy where the monopolistic competition equilibrium would be efficient without the presence of input-output linkages. We compare the social-planner-solution with the decentralized market equilibrium, and we identify first-best policies to correct the distortion. To analyze the trade policy implications we then extend our analysis to a setting with trade between two symmetric countries. We identify first-best cooperative policies, featuring nondiscriminatory subsidies of intermediate input use, aswell as non-cooperative trade policies where countries use tariffs to weigh terms of trade effects against benefits from correcting the input distortion.
WTO membership and the extensive margin of world trade : new evidence
(2009) Felbermayr, Gabriel; Kohler, Wilhelm
Recent literature has argued that, contrary to the results of a seminal paper by Rose (2004), WTO membership does promote bilateral trade, at least for developed economies and if membership includes non-formal compliance. We review the literature in order to identify open issues. We then develop the simplest possible \corner-solutions" version of the gravity model which serves as a framework to readdress these issues. We focus on the extensive margin of trade that separates positive-trade from zero-trade country pairs. We argue that the model can be consistently estimated using Poisson pseudo-maximum-likelihood methods with exporter and importer fixed effects. We account for coding issues and the potential heterogeneity of the WTO membership which recent contributions have stressed. While we find that WTO membership increases the likelihood that a given country pair trades, we do not find that the extensive margin has a strong and systematic effect on the average trade-creating potential of the WTO.