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The paper analyzes the e¤ect of the generosity of the welfare state on the skill composition of immigrants. We develop a parsimonious model in which the e¤ect of an increase in the generosity (and taxes) of the welfare state on the skill composition of immigrants under free migration is negative. The reason is that welfare state bene…ts attract unskilled(More)
Skilled migrants typically contribute to the welfare state more than they draw in bene…ts from it. The opposite holds for unskilled migrants. This suggests that a host country is likely to boost (respectively , curtail) its welfare system when absorbing high-skill (respectively , low-skill) migration. In this paper we …rst examine this hypothesis in a(More)
We study an online learning framework introduced by Mannor and Shamir (2011) in which the feedback is specified by a graph, in a setting where the graph may vary from round to round and is never fully revealed to the learner. We show a large gap between the adversarial and the stochastic cases. In the adversarial case, we prove that even for dense feedback(More)
When planning problems have many kinds of resources or high concurrency, each optimal state has exponentially many minor variants, some of which are " better " than others. Standard methods like A * cannot effectively exploit these minor relative differences, and therefore must explore many redundant, clearly subopti-mal plans. We describe a new optimal(More)
The paper analyzes the e¤ect of the welfare state generosity on the skill composition of migrants across free and policy controlled migration regimes. We develop a parsimonious model in which the e¤ect of an increase in the generosity of the welfare state on the skill composition of migrants under free migration is negative. On the other hand, however, the(More)
The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research. ABSTRACT Skilled migrants typically contribute to the welfare state more than they draw in benefits from it. The opposite holds for unskilled migrants. This suggests that a host country is likely to boost (respectively,(More)
We study the problem of prediction with expert advice when the number of experts in question may be extremely large or even infinite. We devise an algorithm that obtains a tight regret bound of r OpǫT`N`? N T q, where N is the empirical ǫ-covering number of the sequence of loss functions generated by the environment. In addition, we present a hedging(More)
Skilled migrants typically contribute to the welfare state more than they draw in bene…ts from it. The opposite holds for unskilled migrants. This suggests that a host country is likely to boost (respectively , curtail) its welfare system when absorbing high-skill (respectively , low-skill) migration. In this paper we …rst examine this hypothesis in a(More)