Key points are not available for this paper at this time.
Mark P. Jones, Sebastian Saiegh, Pablo T. Spiller, Mariano Tommasi, Amateur Legislators -- Professional Politicians: The Consequences of Party-Centered Electoral Rules in a Federal System, American Journal of Political Science, Vol. 46, No. 3 (Jul., 2002), pp. 656-669
Jones et al. (2002) studied this question.