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Keywords:Externalities (Economics) 

Working Paper
Congestion, agglomeration, and the structure of cities

Superseded by Working Paper 16-13. Congestion pricing has long been held up by economists as a panacea for the problems associated with ever increasing traffic congestion in urban areas. In addition, the concept has gained traction as a viable solution among planners, policymakers, and the general public. While congestion costs in urban areas are significant and clearly represent a negative externality, economists also recognize the advantages of density in the form of positive agglomeration externalities. The long-run equilibrium outcomes in economies with multiple correlated, but ...
Working Papers , Paper 13-25

Working Paper
Competition, syndication, and entry in the venture capital market

There are two ways for a venture capital (VC) firm to enter a new market: initiate a new deal or form a syndicate with an incumbent. Both types of entry are extensively observed in the data. In this paper, I examine (i) the causes of syndication between entrant and incumbent VC firms, (ii) the impact of entry on VC contract terms and survival rates of VC-backed start-up companies, and (iii) the effect of syndication between entrant and incumbent VC firms on the competition in the VC market and the outcomes of incumbent-backed ventures. By developing a theoretical model featuring endogenous ...
Working Papers , Paper 13-49

Journal Article
Dynamics of externalities: a second-order perspective

First-order approximation methods are a standard technique for analyzing the local dynamics of dynamic stochastic general equilibrium (DSGE) models. Although linear methods yield quite accurate solutions for a broad class of DSGE models, some important economic issues (e.g., portfolio choice and welfare) cannot be adequately addressed by first-order methods. This paper provides yet another case when first-order methods may be inadequate for capturing the business cycle properties of a DSGE model. In particular, the authors show that increasing returns to scale (due to production ...
Review , Volume 93 , Issue May , Pages 187-206

Working Paper
Dynamics of externalities: a second-order perspective

We show that increasing returns to scale (due to production externalities) may induce a strong degree of asymmetric income effects and nonlinear dynamics that are not fully appreciated by linear approximation methods. For example, hump-shaped output dynamics can emerge even when externalities are significantly below the threshold level required for indeterminacy, and output expansion tends to be smoother and longer while contraction tends to be deeper but shorter-lived. Thus, mild degree of externalities without triggering indeterminacy can potentially explain the asymmetric property of the ...
Working Papers , Paper 2008-044

Working Paper
Estimating a dynamic equilibrium model of firm location choices in an urban economy

We develop a new dynamic general equilibrium model to explain firm entry, exit, and relocation decisions in an urban economy with multiple locations and agglomeration externalities. We characterize the stationary distribution of firms that arises in equilibrium. We estimate the parameters of the model using a method of moments estimator. Using unique panel data collected by Dun and Bradstreet, we find that our model fits the moments used in estimation as well as a set of moments that we use for model validation. Agglomeration externalities increase the productivity of firms by about 8 ...
Working Papers , Paper 12-26

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