In this paper we develop a simple procedure which delivers tests for the presence of a broken trend in a univariate time series which do not require knowledge of the form of serial correlation in the data and are robust as to whether the shocks are generated by an I(0) or an I(1) process. Two...

In this paper we derive, under the assumption of Gaussian errors with known error covariance matrix, asymptotic local power bounds for seasonal unit root tests for both known and unknown deterministic scenarios and for an arbitrary seasonal aspect. We demonstrate that the optimal test of a unit...

This paper considers the currency composition of sovereign debt in the context of risk-sharing through excusable defaults. It is shown that monetary credibility is not a sufficient condition for borrowing in domestic currency. With real exchange rate risk, debt denominated in a borrowing...

Whether higher productivity of the foreign firm increases host country welfare depends on whether the reason for foreign direct investment (FDI) is to save the trade cost or to get the advantage of cheap labor. We show that, if the reason for FDI is to get the advantage of cheap labor, higher...

We examine an incentive scheme for a group of agents, where all agents are rewarded if the group meets its target. If the group does not meet its target, only the agents that meet their individual target are rewarded. In environmental policy, the EU burden sharing agreement and the UK Climate...