De Paola, Maria and Scoppa, Vincenzo (2005): The Role of Family Ties in the Labour Market. An Interpretation Based on Efficiency Wage Theory. Unpublished.
Ponzo, Michela and Scoppa, Vincenzo (2008): The Use of Informal Networks in Italian Labor Markets: Efficiency or Favoritisms? Unpublished.
Scoppa, Vincenzo (2009): Technological Catch-up or Neoclassical Convergence? Identifying the Channels of Convergence for Italian Regions. Unpublished.
Scoppa, Vincenzo (2008): Are Subjective Evaluations Biased by Social Factors or Connections? An Econometric Analysis of Soccer Referee Decisions. Unpublished.
Scoppa, Vincenzo (2007): Quality of Human and Physical Capital and Technological Gaps across Italian Regions. Unpublished.