This paper studies why illegal immigration is widespread. We develop a political agency model in which a politician decides on an immigration target and its enforcement, facing uncertainty on the supply of migrants. Illegal immigration can arise for two reasons: the policy maker may be unable to...

This paper develops a theory of the endogenous formation of a common market in a three-country, two-factor political economy model. In the status quo, Home and Foreign implement non-discriminatory policies towards international factor flows, as to maximize the domestic median voter\'s welfare....

This paper develops a theory of the endogenous formation of a common market in a three-country, two-factor political economy model. In the status quo, Home and Foreign implement nondiscriminatory policies toward international factor flows in order to maximize the domestic median voter's welfare....

During the last decade unicameral proposals have been put forward in fourteen US states. In this paper we propose a theoretical framework casting some lights on the drawbacks of bicameral state legislatures and on the effects of the proposed constitutional reforms. In a setting where lawmakers...

This paper develops a theory of the endogenous formation of a common market in a three-country, two-factor political economy model. In the status quo, Home and Foreign implement non-discriminatory policies towards international factor flows, as to maximize the domestic median voter's welfare....

This paper develops a simple two-period model of public good provision within a federation. A national public good is provided to both states by the federal government, while a local public good is supplied by each state government. The federal government levies a proportional income tax, and in...

We model the role of a parliament’s structure in shaping the accountability of elected representatives. In a setting in which lawmakers interact with a lobby through a bargaining process and with voters by means of elections, we show that only a single legislative body who can make take it or...

In 2008, approximately 12 million immigrants lived illegally in the United States, and large numbers of undocumented foreigners resided also in other advanced destination countries. Hence, attempts at controlling immigration flows seem to often fail. If governments are not enforcing their...

Despite restrictive migration policies, large numbers of undocumented migrants reside in many destination countries. If official migration targets are not enforced, why are they devised? To address this puzzle, we develop a political agency model with uncertainty on the migrants' supply, where...

Preliminary experimental results obtained from the treatment of semi-solid wastes generated from wholesale fruit and vegetable markets, supermarkets, etc. mixed together with sewage sludge, are reported.