1. Tied aid and welfare;K Abe;Review of International Economics,2005
2. A theoretical foundation for the gravity equation;J E Anderson;The American Economic Review,1979
3. Gravity with Gravitas: A Solution to the Border Puzzle;J E Anderson;American Economic Review,2003
4. Some tests of specification for panel data: Monte Carlo evidence and an application to employment equations;M Arellano;The Review of Economic Studies,1991
5. Tied and untied foreign aid: a theoretical and empirical analysis;B M Arvin;Keio Economic Studies,1997