Campbell, Douglas L. (2011): Estimating the impact of currency unions on trade using a dynamic gravity framework. Unpublished.
Campbell, Douglas L. (2012): Estimating the Impact of Currency Unions on Trade Using a Dynamic Gravity Framework. Unpublished.
Campbell, Douglas L. (2010): History, culture, and trade: a dynamic gravity approach. Unpublished.
Campbell, Douglas L. and Pyun, Ju Hyun (2011): The Diffusion of Development: Along Genetic or Geographic Lines? Unpublished.
