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on Contract Theory and Applications |
| By: | Mohamed Belhaj (GREQAM - Groupement de Recherche en Économie Quantitative d'Aix-Marseille - ECM - Ecole Centrale de Marseille - CNRS - Centre National de la Recherche Scientifique - AMU - Aix Marseille Université - EHESS - École des hautes études en sciences sociales); Frédéric Deroïan (GREQAM - Groupement de Recherche en Économie Quantitative d'Aix-Marseille - ECM - Ecole Centrale de Marseille - CNRS - Centre National de la Recherche Scientifique - AMU - Aix Marseille Université - EHESS - École des hautes études en sciences sociales) |
| Abstract: | We consider a network game with local complementarities. A policymaker, aiming at minimizing or maximizing aggregate effort, contracts with a single agent on the network to trade effort change against transfer. The policymaker has to find the best agent and the optimal contract to offer. Our study shows that for all utilities with linear best-responses, it only takes two statistics about the position of each agent on the network to identify the key player: the Bonacich centrality and a weighted measure of the number of closed walks originating from the agent. We also characterize key players under linear quadratic utilities for various contractual arrangements. |
| Keywords: | key player,network,linear interaction,incentives,contract,limited budget |
| Date: | 2018–02 |
| URL: | http://d.repec.org/n?u=RePEc:hal:wpaper:halshs-01699849&r=cta |
| By: | Lin William Cong; Zhiguo He |
| Abstract: | Blockchain technology features decentralized consensus as well as tamper-proof and algorithmic executions, and consequently enlarges the contracting space through smart contracts. Meanwhile, the process of generating decentralized consensus, which involves information distribution, necessarily alters the informational environment. We analyze how decentralization improves consensus effectiveness, and how the quintessential features of blockchain reshape industrial organization and the landscape of competition. Smart contracts can mitigate information asymmetry and deliver higher social welfare and consumer surplus through enhanced entry and competition, yet blockchains may also encourage collusion due to the irreducible distribution of information, especially in consensus generation. In general, blockchains can sustain market equilibria with a larger range of economic outcomes. We further discuss anti-trust policy implications targeted to blockchain applications, such as separating consensus record-keepers from users. |
| JEL: | D4 D8 G2 L13 L4 O3 |
| Date: | 2018–03 |
| URL: | http://d.repec.org/n?u=RePEc:nbr:nberwo:24399&r=cta |
| By: | Rudy Douven (CPB Netherlands Bureau for Economic Policy Analysis); Monique Burger; Erik Schut |
| Abstract: | In the Dutch health care system health insurers negotiate with hospitals about the pricing of hospital products in a managed competition framework. In this paper, we study these contract prices that became for the first time publicly available in 2016. The data show substantive price variation between hospitals for the same products, and within a hospital for the same product across insurers. About 27% of the contract prices for a hospital product is 20% higher or lower than the average contract price in the market. For about half of the products the highest and lowest contract price across hospitals differ by a factor three or more. Moreover, hospital product prices do not follow a consistent ranking across hospitals, suggesting substantial cross subsidization between hospital products. Potential explanations for the large and seemingly random price variation are: (i) different cost pricing methods used by hospitals, (ii) uncertainty due to frequent changes in the hospital payment system; (iii) price adjustments related to negotiated lumpsum payments, and (iv) differences in hospital and insurer market power. Several policy options are discussed to reduce variation and increase transparency of hospital prices. |
| JEL: | I00 I11 L11 L51 |
| Date: | 2018–03 |
| URL: | http://d.repec.org/n?u=RePEc:cpb:discus:378&r=cta |