1. Optimal income taxation: An example with a u-shaped pattern of optimal marginal tax rates;P A Diamond;American Economic Review,1998
2. Le Chatelier Principle;T Hatta;The New Palgrave: A Dictionary of Economics,1987
3. The Optimal Income Tax: Some Comparative Statics Results;E Helpman;Journal of Public Economics,1978
4. The LeChatelier Principle;P Milgrom;American Economic Review,1996
5. Exploration in the theory of optimal income taxation;J A Mirrlees;Review of Economic Studies,1971