1. High Wage Workers and High Wage Firms
2. “Race and Gender in the Labour Market”;ALTONJI,1999
3. AMBROSIO L. FUSCO N. and PALLARA D. (2000), Functions of Bounded Variation and Free Discontinuity Problems, Vol. 254. (Oxford: Clarendon Press).
4. AMBROSIO L. GIGLI N. and SAVARÉ G. (2004), Gradient Flows with Metric and Differentiable Structures, and Applications to the Wasserstein Space, Vol. 15. (Rome: Accademia Nazionale dei Lincei).