Current statistical approaches to modeling many economic relationships are grounded in traditional ideas of deterministic trends. Some of the failures of these approaches are due to inappropriate models using time series with “unit roots.” After a shock, unit root processes do not revert to...

The policymaking problem in international trade is fundamentally strategic, since optimal national policy depends on what other nations choose to do. The game is not between unitary rational actors, however, but rather between players with considerable internal divisions about what policy should...

An evaluation of the changes in Congress's structure that occurred in the 1970s requires attention to three dimensions of its performance as a policymaking institution: representation of interests, deliberation, and conflict resolution. Considered this way, the changes seem to have enhanced some...