Working Papers

• Project Networks and Reallocation Externalities,
  with Harish Krishnan and Juan Serpa
  Major revision at Management Science
  • Selected to MSOM Supply Chain SIG conference (2022)
    
  • Selected to 1st ACM conference on Equity and Access in Algorithms, Mechanisms, and Optimization (EAAMO'21)
  Abstract

  When assigning responsibility for delays, project participants ignore a key fact: a project belongs to a large interconnected network of clients, contractors, and subcontractors. In this network, firms manage multiple projects concurrently. Accordingly, a disruption in one project forces all parties to reallocate resources from other concurrent projects, causing externalities across the wider project network. We use data from 2.6 million U.S. public projects – and their networks – to quantify the importance of these network externalities.
• The Effect of Expedited Payments on Project Delays: Evidence from QuickPay Reform,
  with Volodymyr Babich, Harish Krishnan, and Jie Ning
  
  Abstract

  Contractors are typically not paid instantaneously upon completing the project tasks and furnishing the invoice. We study the impact of payment timings on project delays. We develop theories that explain how payment duration affects project completion, and generate testable hypotheses. We empirically test these hypotheses using data on U.S. public projects. Our identification strategy uses a policy amendment that expedited payments to certain federal contractors as an exogenous shock.

Journal Publications

• Managing Reputation Risk in Supply Chains: The Role of Risk-sharing under Limited Liability,
  with Harish Krishnan
  Management Science, 67(8): ‍4845-4862, 2021
  Preprint: SSRN

• Solving Semi-open Queuing Networks with Time-varying Arrivals: An Application in Container Terminal Landside Operations,
  with Govind Kumawat, Debjit Roy, and René de Koster
  European Journal of Operational Research, 267(3): 855-876, 2018

• A Cooperative Quay Crane-based Stochastic Model to Estimate Vessel Handling Time,
  with Debjit Roy and René de Koster
  Flexible Services and Manufacturing Journal, 29: 97-124, 2017

• Modeling Emergency Evacuation with Time and Resource Constraints: A Case Study from Gujarat,
  with Debjit Roy
  Socio-Economic Planning Sciences, 51: 23-33, 2015

Book Chapter

• A Two-level Stochastic Model to Estimate Vessel Throughput Time,
  with Debjit Roy and René de Koster
  Progress in Material Handling Research: 2014, Material Handling Institute, Charlotte, NC.