Voucher privatization has emerged as a feature of the transition in post-communist economies. While the choice problem facing voucher holders is strikingly similar to the conventional portfolio choice problem, the voucher portfolio problem (VPP) has two important distinguishing characteristics....

Consider a financial market equilibrium with correlated firms and risk averse investors holding diversified portfolios. When an activist investor has the ability to perform value-enhancing activities in a single firm, and these activities increase with ownership, we show that optimizing behavior...

We present a model of agents facing the uncertainty of two future forms of government who are able to insure against this uncertainty by hiding funds from taxation. In order to choose whether or not to hide funds from taxation, agents need to know policy choices that each government would make...