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Jim Y. Jin

Bio: Jim Y. Jin is an academic researcher from University of St Andrews. The author has contributed to research in topics: Cournot competition & Bertrand competition. The author has an hindex of 13, co-authored 48 publications receiving 550 citations. Previous affiliations of Jim Y. Jin include Social Science Research Center Berlin & Queen's University Belfast.

Papers
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Journal ArticleDOI
TL;DR: In this article, the authors assess the view that Bertrand equilibrium is intrinsically more competitive than Cournot equilibrium and provide counter-examples showing that no clear-cut comparison of prices and quantities is possible without strategic complementarity in either of the two games.

116 citations

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TL;DR: In this article, a model of learning is introduced to argue that educated workers may transfer part of their general skills to uneducated workers, and they find evidence of large firm-level social returns (between 14% and 23%), much larger than standard estimates of private returns.
Abstract: Do workers benefit from the education of their co-workers? We examine this question first by introducing a model of learning, which argues that educated workers may transfer part of their general skills to uneducated workers, and then by examining detailed matched employer–employee panel data from Portugal. We find evidence of large firm-level social returns (between 14% and 23%), much larger than standard estimates of private returns, and of significant returns accruing to less educated workers but not to their more educated colleagues.

64 citations

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TL;DR: This paper provides a thorough exploration of the microeconomic foundations for the multi-variate linear demand function for differentiated products, which is widely used in industrial organization and finds that strict concavity of the quadratic utility function is critical for the demand system to be well defined.

61 citations

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TL;DR: In this paper, the authors compare simultaneous versus sequential moves in R&D decisions within an asymmetric RC/Cournot model with linear demand (for differentiated products) and spillovers, and show that a sequential solution mitigates competition and leads to higher profits for each firm.
Abstract: We compare simultaneous versus sequential moves in R&D decisions within an asymmetric R&D/Cournot model with linear demand (for differentiated products), general R&D costs, and spillovers. Simultaneous play and sequential play (with and without a specified leader) can emerge as appropriate formulations, depending on the ratios of spillover rate over demand cross-slope, but not on R&D efficiency. When at least one ratio is above 1/2, a sequential solution mitigates competition and leads to higher profits for each firm, and to higher social welfare. When uniquely specified, the stronger firm emerges as the R&D first-mover.

52 citations

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TL;DR: In this article, the authors explore economically meaningful forms of cost functions for process research and development in the presence of imperfect appropriability of inventive output, and identify economically plausible restrictions on the size of spillovers and on the properties of the R&D cost function so as to bring about compatibility with the above postulate.

29 citations


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01 Jan 2014

1,519 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the effect of high school graduation on participation in criminal activity accounting for endogeneity of schooling and found that completing high school reduces the probability of incarceration by about.76% for whites and 3.4% for blacks.
Abstract: We estimate the effect of high school graduation on participation in criminal activity accounting for endogeneity of schooling. We begin by analyzing the effect of high school graduation on incarceration using Census data. Instrumental variable estimates using changes in state compulsory attendance laws as an instrument for high school graduation uncover a significant reduction in incarceration for both blacks and whites. When estimating the impact of high school graduation only, OLS and IV estimators estimate different weighted sums of the impact of each schooling progression on the probability of incarceration. We clarify the relationship between OLS and IV estimates and show that the 'weights' placed on the impact of each schooling progression can explain differences in the estimates. Overall, the estimates suggest that completing high school reduces the probability of incarceration by about .76 percentage points for whites and 3.4 percentage points for blacks. We corroborate these findings using FBI data on arrests that distinguish among different types of crimes. The biggest impacts of graduation are associated with murder, assault, and motor vehicle theft. We also examine the effect of drop out on self-reported crime in the NLSY and find that our estimates for imprisonment and arrest are caused by changes in criminal behavior and not educational differences in the probability of arrest or incarceration conditional on crime. We estimate that the externality of education is about 14-26% of the private return to schooling, suggesting that a significant part of the social return to education comes in the form of externalities from crime reduction.

1,301 citations

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TL;DR: Moretti et al. as mentioned in this paper investigated workers' education, spillovers, and productivity at plant-level production functions using data from the California Center for Population Research on-line working paper series.
Abstract: ^California Center for Population Research p U n i v e r s i t y of California - L o s A n g e l e s Workers' Education, Spillovers, and Productivity: Evidence from Plant-Level Production Functions Enrico Moretti CCPR-012-03 January California Center for Population Research On-Line Working Paper Series

950 citations