How would a policy that bans the use of networks in hiring (e.g., anti-old boy network laws) affect welfare? To answer this question, we examine a variant of Galenianos (2013), a version of a random search model with two matching technologies: a standard matching function and worker networks. Our model has two types of workers, networked workers and non-networked workers. It is shown that the effects of such a policy on non-networked workers can be either positive or negative, depending on model parameters. In our calibration such a policy would make non-networked workers slightly worse off and networked workers substantially worse off.
We investigate in details a Trejos-Wright random matching model of money with a consumer take-it-or-leave-it o¤er and the individual money holding set f0; 1; 2g. First we show generic existence of three kinds of steady states: (1) pure-strategy full-support steady states, (2) mixed-strategy full-support steady states, and (3) non-full-support steady states, and then we show relations between them. Finally we provide stability analyses. It is shown that (1) and (2) are locally stable, (1) being also determinate. (3) is shown to be unstable. (JEL classi…cation: C62, C78, E40)
Lotteries are introduced into Cavalcanti and Erosa (2008) [2], a version of Trejos and Wright (1995) [4] with aggregate shocks. Lotteries improve welfare and eliminate the two notable features of the optimum with deterministic trades: over-production and history-dependence. Moreover, the optimum can be supported by buyer take-it-or-leave-it offers.
Zhu (2003) shows existence of full-support monetary steady states with strictly concave value functions in a random matching model with individual money holdings in {0, 1, 2, ..., B} for a general B. He also shows that corresponding to each such steady state is an l-replica steady state for each l ∈ N: money is traded in bundles of l units, the support is {0, l, 2l, ..., lB}, and the value function is a step-function with jumps at points of the support. We show that such l-replicas are unstable if the underlying full-support steady state is a pure strategy steady state and if the support of the initial distribution is not {0, l, 2l, ..., lB}. (JEL classification: C62, C78, E40)
We present a Merton (J Finance, 1974)-type structural model of credit risk in which the borrower firm refinances its debt, there is cost for bankruptcy, and the creditor has an option to extend the date of maturity of debt if the firm defaults. We show that a solution exists in such a model and in that solution the creditor has incentive to extend maturity to avoid bankruptcy cost. We solve the model numerically and argue that such maturity extension option for the creditor can have substantial impact on the debt and stock values of the firm.
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