Economics Research Works
Permanent URI for this collectionhttp://hdl.handle.net/1903/9
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Item Path Curves and Plant Buds: an Introduction to the Work of Lawrence Edwards(International Institute for Applied Systems Analysis, 1979-07) Almon, ClopperLawrence Edwards has shown that many flowering plants have buds with an outline in the form of a path curve, the curve that a point follows under repeated projective transformation of the plane into itself. Edwards, however, did not give a formula for these curves nor did he fit the curves by the standard method of least squares. This paper gives an elementary exposition of the method used by Edwards, shows its relation to projective geometry, and then uses homogeneous coordinates, linear differential equations and characteristic values and vectors of a matrix to derive the formula for path curves. This formula is then used to fit path curves by least squares to data provided by Edwards for the buds of 150 plants. Most buds are fit very closely.Item A Brief Guide to C and C++ for Fortran or Basic Programmers(1999) Almon, ClopperThis paper introduces C and C++ programming for learners who already have some experience in another language such as Fortran or Basic. It explains basic syntax, dynamic space allocation, structures, classes, constructors and destructors, and overloading of operators. All concepts are illustrated with working programs.Item The Distributional Effects of Carbon Regulation(Edward Elgar, 1999) Cramton, Paul A.Item Nonrandom Mixing Models of HIV Transmission(Springer-Verlag, 1989) Kaplan, Edward H.; Cramton, Peter; Paltiel, A. DavidModels of HIV transmission and the AIDS epidemic generally assume random mixing among those infected with HIV and those who are not. For sexually transmitted HIV, this implies that individuals select sex partners without regard to attributes such as familiarity, attractiveness, or risk of infection. This paper formulates a model for examining the impact of nonrandom mixing on HIV transmission. We present threshold conditions that determine when HIV epidemics can occur within the framework of this model. Nonrandom mixing is introduced by assuming that sexually active individuals select sex partners to minimize the risk of infection. In addition to variability in risky sex rates, some versions of our model allow for error (or noise) in information exchanged between prospective partners. We investigate several models including random partner selection (or proportionate mixing), segregation of the population by risky sex rates, a probabilistic combination of segregation and random selection induced by imperfect information (or preferred mixing), and a model of costly search with perfect information. We develop examples which show that nonrandom mixing can lead to epidemics that are more severe or less severe than random mixing. For reasonable parameter choices describing the AIDS epidemic, however, the results suggest that random mixing models overstate the number of HIV infections that will occur.Item The Effect of Collective Bargaining Legislation on Strikes and Wages(MIT Press, 1999) Cramton, Peter; Gunderson, Morley; Tracy, JosephUsing Canadian data on large, private-sector contract negotiations from January 1967 to March 1993, we find that strikes and wages are substantially influenced by labor policy. The data indicate that conciliation policies have largely been ineffective in reducing strike costs. In contrast, general contract reopener provisions appear to make both unions and employers better off by reducing negotiation costs without systematically affecting wage settlements. Legislation banning the use of replacement workers appears to lead to significantly higher negotiation costs and redistribution of quasi-rents from employers to unions.Item Shrewd Bargaining on the Moral Frontier: Toward a Theory of Morality in Practice(Philosophy Documentation Center, 1991) Dees, J. Gregory; Cramton, PeterFrom a traditional moral point of view, business practitioners often seem overly concerned about the behavior of their peers in deciding how they ought to act. We propose to account for this concern by introducing a mutual trust perspective, where moral obligations are grounded in a sense of trust that others will abide by the same rules. When grounds for trust are absent, the obligation is weakened. We illustrate this perspective by examining the widespread ambivalence with regard to deception about one’s settlement preferences in negotiation. On an abstract level, such deception generally seems undesirable, though in many individual cases it is condoned, even admired as shrewd bargaining. Because of the difficulty in verifying someone’s settlement preferences, it is hard to establish a basis for trusting the revelations of the other party, especially in competitive negotiations with relative strangers.Item Promoting Honesty in Negotiation: An Exercise in Practical Ethics(Philosophy Documentation Center, 1993) Cramton, Peter; Dees, J. GregoryIn a competitive and morally imperfect world, business people are often faced with serious ethical challenges. Harboring suspicions about the ethics of others, many feel justified in engaging in less-than-ideal conduct to protect their own interests. The most sophisticated moral arguments are unlikely to counteract this behavior. We believe that this morally defensive behavior is responsible, in large part, for much undesirable deception in negotiation. Drawing on recent work in the literature of negotiations, we present some practical guidance on how negotiators might build trust, establish common interests, and secure credibility for their statements thereby promoting honesty. We also point out the types of social and institutional arrangements, many of which have become commonplace, that work to promote credibility, trust, and honesty in business dealings. Our approach is offered not only as a specific response to the problem of deception in negotiation, but as one model of how research in business ethics might offer constructive advice to practitioners.Item Money Out of Thin Air: The Nationwide Narrowband PCS Auction(Blackwell, 1995) Cramton, PeterThe Federal Communications Commission held its first auction of radio spectrum at the Nationwide Narrowband PCS Auction in July 1994. The simultaneous multiple-round auction, which lasted five days, was an ascending bid auction in which all licenses were offered simultaneously. This paper describes the auction rules and how bidders prepared for the auction. The full history of bidding is presented. Several questions for auction theory are discussed. In the end, the government collected $617 million for ten licenses. The auction was viewed by all as a huge success—an excellent example of bringing economic theory to bear on practical problems of allocating scarce resources.Item Synergies in Wireless Telephony: Evidence from the Broadband PCS Auctions(Blackwell, 1997) Ausubel, Lawrence M.; Cramton, Peter; McAfee, R. Preston; McMillan, JohnWe examine bid data from the first two broadband PCS spectrum auctions for evidence of value synergies. First, we estimate a benchmark regression for the determinants of final auction prices. Then, we include variables reflecting the extent to which bidders ultimately won or already owned the adjacent wireless properties. Consistent with geographic synergies in an ascending-bid auction, prices were higher when the highest-losing bidder had adjacent licenses. The footprints of winning bidders suggest that they were often successful in realizing these synergies.Item Using Auctions to Divest Generation Assets(Elsevier Science, 1997-12) Cameron, Lisa J.; Cramton, Peter; Wilson, RobertIn most states, ratepayers will compensate utilities for their stranded costs. As a result, these costs must be measured as accurately as possible, in a manner that is easily understood by all concerned parties. We describe the options for measuring stranded costs and argue that a simultaneous ascending auction is the best approach.