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Christian Basteck

Strategy-Proof and Envy-Free Random Assignments

We study the random assignment of indivisible objects among a set of agents with strict preferences. We show that there exists no mechanism which is unanimous, strategy-proof and envy-free. Weakening the first requirement to q-unanimity – i.e., when every agent ranks a different object at the top, then each agent shall receive his most-preferred object with probability of at least q – we show that a mechanism satisfying strategy-proofness, envy-freeness and ex-post weak non-wastefulness can be q-unanimous only for q ≤ 2/n (where n is the number of agents). To demonstrate that this bound is tight, we introduce a new mechanism, Random-Dictatorship-cum-Equal-Division (RDcED), and show that it achieves this maximal bound when all objects are acceptable. In addition, for three agents, RDcED is characterized by the first three properties and ex-post weak efficiency. If objects may be unacceptable, strategy-proofness and envy-freeness are jointly incompatible even with ex-post weak non-wastefulness.


Manuel Santos de Silva

Right-wing populism in the tropics: Economic crisis, the political gender gap, and the election of Bolsonaro

Christoph Trebesch

Populist Leaders and the Economy

Populism at the country level is at an all-time high, with more than 25% of nations currently governed by populists. How do economies perform under populist leaders? We build a new cross-country database identifying 50 populist presidents and prime ministers 1900-2018. We find that the economic cost of populism is high. After 15 years, GDP per capita is more than 10% lower compared to a plausible non-populist counterfactual. Rising economic nationalism and protectionism, unsustainable macroeconomic policies, and institutional decay under populist rule do lasting damage to the economy.


Melanie Krause

Headwind or Tailwind at the Ballot Box? The Local Effect of Wind Turbines on Green Party Support

Katja Kaufmann

Spillover Effects of Old-Age Pension Across Generations: Family Labor Supply and Child Outcomes