Publications

Publications
Publications
We strongly believe in open source and giving to our community. We work directly with researchers in academia and seek out new perspectives with our intern and fellowship programs. We generalize our solutions and release them to the world as open source projects. We host discussions and publish our results.

Publications

Journal of Law, Economics and Organization

Auctions versus Negotiations in Procurement: An Empirical Analysis

Patrick Bajari, Robert McMillan

Should the buyer of a customized good use competitive bidding or negotiation to select a contractor? To shed light on this question, we consider several possible determinants that may influence the choice of auctions versus negotiations. We then examine a comprehensive data set of private sector building contracts awarded in Northern California during the years 1995-2000.

The analysis suggests a number of possible limitations to the use of auctions. Auctions may perform poorly when projects are complex, contractual design is incomplete and there are few available bidders.

Furthermore, auctions may stifle communication between buyers and sellers, preventing the buyer from utilizing the contractor's expertise when designing the project. Some implications of these results for procurement in the public sector are discussed. JEL classifications: D23, D82, H57, L14, L22, L74.

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Journal of Industrial Economics, forthcoming

Contracting for Government Services: Theory and Evidence from U.S. Cities

Jonathan Levin

Local governments can provide services with their own employees or by contracting with private or public sector providers. We develop a model of this “make-or-buy” choice that highlights the trade-off between productive efficiency and the costs of contract administration.

We construct a dataset of service provision choices by U.S. cities and identify a range of service and city characteristics as significant determinants of contracting decisions.

Our analysis suggests an important role for economic efficiency concerns, as well as politics, in contracting for government services. JEL codes: D23, D73, H11, L33

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Proceedings of the Eighth National Conference on Artificial Intelligence (AAAI-90), Boston, MA, July 1990

Dynamic across-time measurement interpretation

Dennis DeCoste

Incrementally maintaining a qualitative understanding of physical system behavior based on observations is crucial to real-time process monitoring, diagnosis, and control.

This paper describes the DATMI theory for dynamically maintaining a pinterp-space, a concise representation of the local and global interpretations consistent with observations over time. Each interpretation signifies an alternative path of states in a qualitative envisionment.

DATMI can use domain-specific knowledge about state and transition probabilities to maintain the best working interpretation. By maintaining the space of alternative interpretations as well, DATMI avoids the need for extensive backtracking to handle incomplete or faulty data.

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The Effect of Medicaid on Health Care Consumption of Young Adults

Dominic Coey

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Europ. J. Appl. Math., 11, issue 2, pp. 61-80

A numerical scheme for free boundary problems that are gradient flows for the area functional

Many moving boundary problems that are driven in some way by the curvature of the free boundary are gradient flows for the area of the moving interface. Examples are the Mullins-Sekerka flow, the Hele-Shaw flow, flow by mean curvature, and flow by averaged mean curvature. The gradient flow structure suggests an implicit finite differences approach to compute numerical solutions.

The proposed numerical scheme will allow to treat such free boundary problems in both R2 and R3. The advantage of such an approach is the re-usability of much of the setup for all of the different problems. As an example of the method we will compute solutions to the averaged mean curvature flow that exhibit the formation of a singularity.

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