Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Varian's (Varian, H., 1974. Equity, Envy and Efficiency. Journal of Economic Theory 9, 63-91) main results are not valid anymore if the agents are asymmetrically informed at the time of contracting: 1) envy-freeness and efficiency may be incompatible; 2) there may exist efficient allocation rules such that every agent envies another. Two weaker positive properties are formulated.