Sergio Pelaez

Ph.D. Student

Member Of:
  • School of Public Policy
Email Address:


Personal Pronouns:
He / Him

Sergio is a doctoral student in Public Policy at Georgia Tech and a Graduate Research Assistant at STIP. His research examines how policy, incentives, and social networks shape researchers' scientific and technological outcomes and the societal impacts of such activities. He is also interested in unraveling the determinants of business innovation and identifying its effects on firms' performance.

  • MA Economics of Public Policy, Universidad del Rosario
  • BA Economics, Universidad Autonoma de Manizales
  • BA Business, Universidad Autonoma de Manizales
Areas of
  • Business Innovation
  • Causal Inference
  • Development Economics
  • Industrial Organization
  • Machine Learning
  • Scientometrics


Research Fields:
  • Applied Microeconomics
  • Development Economics
  • Economics of Innovation
  • Industrial Organization
  • Science, Technology, and Innovation Policy
  • Technology and Innovation

Recent Publications

Journal Articles

  • Analyzing research outcomes and spillovers at a US nanotechnology user facility
    In: Journal of Nanoparticle Research [Peer Reviewed]
    Date: November 2022


    This paper maps research outcomes and identifies spillover effects at a US University Research Center (URC) that offers user facilities for nanotechnology research. We use scientometric and network science approaches to analyze measures of topical orientation, productivity, impact, and collaboration applied to URC-related Web of Science abstract publications records. A focus is on the analysis of spillover effects on external organizations (i.e., non-affiliated users). Our findings suggest the URC’s network relies on external organizations acting as brokers, to provide access to the facilities to other external organizations. Analysis of heterophily indicates that collaboration among internal and external organizations is enhanced by the facilities, while articles written by a mix of co-authors affiliated with internal and external organizations are likely to be more cited. These results provide insights on how URCs with user facilities can create conditions for diverse collaboration and greater research impact.


    View All Details about Analyzing research outcomes and spillovers at a US nanotechnology user facility

  • Taxation and innovation: evidence from Colombia
    In: Economics of Innovation and New Technology [Peer Reviewed]
    Date: November 2022


    We use firm-level data from a Colombian manufacturing survey, complemented with data from the tax department, to test the effect of firms’ total tax and contribution rate (TCR) on the ratio of innovation expenditures to sales. We construct a data panel from 2003 to 2018 comprising 104,762 observations and implement fixed effects and instrumental variables estimation methods. Our results suggest that an increase of one percentage point in direct taxation leads to a decrease of 0.10% in the probability that firms engage in innovation investments, and market power moderates this effect. We discuss distinctive features of the effect of taxation on innovation in emerging economies—one being the inability of local innovation clusters to temper it. Policy implications include considering modifications to the magnitude and composition of the TCR as an alternative to R&D tax credits.

    View All Details about Taxation and innovation: evidence from Colombia