INDIVIDUAL BEHAVIOR AND BIDDING HETEROGENEITY IN SEALED BID AUCTIONS WHERE THE NUMBER OF BIDDERS IS UNKNOWN

This article uses laboratory data from a series of first‐price (FP) and second‐price (SP) sealed bid auctions in which the number of bidders is unknown to test for possible deviations of individual behavior from theory and study the source of heterogeneity in bidding. In SP auctions we find a substantial amount of coincidence with theory. We observe systematic deviations from risk neutral bidding in FP auctions and show theoretically that these deviations are consistent with risk averse preferences. We find essentially no heterogeneity in bidding in SP auctions where risk preferences and the number of bidders do not affect the optimal bid, while in the FP auctions heterogeneity in bidding persists with experience. We find that heterogeneity in bidding in FP auctions is consistent with heterogeneity in risk preferences, the attempt to count the number of bidders in the auction, and bidder specific noise. (JEL D44, C91)     

ASSET MANAGEMENT,ALLOCATION OF TIME,AND RETURNS TO SAVING*

The paper entertains the proposition that individuals' time performs a productive role in generating nonwage income through the management of nonhuman capital assets. The asset management hypothesis is used to develop a life cycle model of consumptive and productive decisions. The model allows for variations in gross rates of return both across persons at a point in time and for any one person over his life cycle. The behavioral implications developed show that differences across consumption units in their time allocations and in their borrowing, saving, and asset holding decisions may be the result of differences in opportunities rather than “tastes.”     

Children in Care--the Association With Mental Disorder in the Parents

Summary A study was made of 31 families of children who had stayed incare for at least 12 months, and of 26 families (coming fromthe same district) with children who had been in care for upto three months. Information about the parents' mental healthwas obtained from social work records, psychiatric records andinterviews with the parents. The parents of children in carefor the longer period were more likely to have received psychiatrictreatment and appeared to suffer from more severe or longstandingdisorders, as evidenced by admissions into psychiatric hospitaland type of psychiatric diagnosis. However our most strikingfinding was the high rate of past and current psychiatric disorderin the total sample of parents; this appeared to be an importantfactor influencing children's admissions into, and dischargefrom, care.     

SOCIAL SECURITY, THE FAMILY, AND ECONOMIC GROWTH

We show that a defined-benefits PAYG social security system distorts key family-based choices that affect economic growth. We identify human capital as the engine of growth, and the motivating forces linking the family's overlapping generations as mutually productive intergenerational transfers and/or altruism. The PAYG system is shown to affect adversely at least one of three determinants of the economy's growth path: fertility, savings, and investment in human capital. The specific effects may vary over different stages of economic development. The growth rate is expected to fall in advanced economies. Our analysis indicates that the effect may be sizeable. ( JEL 915, 111, 850)     

IN SEARCH OF THE WINNER'S CURSE

Earlier papers on the winner's curse have provided theoretical arguments that winning bidders in an auction will incur ex post losses even when all bidders use reasonable ex ante bidding strategies. This paper demonstrates that these arguments are erroneous: optimal ex ante bidders will never suffer from a winner's curse in an auction where only the winning bid is announced; furthermore, such bidders will on the average not suffer from a winner's curse in an auction where all bids are announced. Thus if a winner's curse is a behavioral reality then bidders are not generally using ex ante optimal strategies.