Please use this identifier to cite or link to this item:
Pérez-Nievas, Mikel
Conde-Ruiz, José Ignacio
Giménez, Eduardo L.
Year of Publication: 
[Journal:] Theoretical Economics [ISSN:] 1555-7561 [Volume:] 14 [Year:] 2019 [Issue:] 2 [Pages:] 475-512
This paper explores the properties of the notions of A-efficiency and P-efficiency, proposed by Golosov, Jones and Tertilt (Econometrica, 2007), to evaluate allocations in a general overlapping generations setting in which fertility choices are endogenously selected from a continuum and any two agents of the same generation are identical. First, we show that the properties of A-efficient allocations vary depending on the criterion used to identify potential agents. If one identifies potential agents by their position in their siblings' birth order --as Golosov, Jones and Tertilt do--, then A-efficiency requires that a positive measure of agents use most of their endowment to maximize the utility of the dynasty head, which, in environments with finite horizon altruism, implies that some agents --the youngest in every family-- obtain an arbitrary low income to finance their own consumption and fertility plans. If potential agents are identified by the dates in which they may be born, then A-efficiency reduces to dynastic maximization, which, in environments with finite horizon altruism, drives the economy to a collapse in finite time. To deal with situations, like those arising in economies with finite horizon altruism, in which A-efficiency may be in conflict with individual rights, we propose to evaluate the efficiency of a given allocation with a particular class of specifications of P-efficiency, for which the utility attributed to the unborn depends on the utility obtained by their living siblings. Under certain concavity assumptions on value functions, we also characterize every symmetric, P-efficient allocation as a Millian efficient allocation, that is, as a symmetric allocation that is not A-dominated --with the Birth-Order criterion-- by any other symmetric allocation.
optimal population
endogenous fertility
millian efficiency
birth-order criterion
birth-date criterion
Persistent Identifier of the first edition: 
Creative Commons License:
Document Type: 

Files in This Item:

Items in EconStor are protected by copyright, with all rights reserved, unless otherwise indicated.