Raise your voice! Activism and peer effects in online social networks by Dr Agustina Martinez (Leicester)

Raise your voice! Activism and peer effects in online social networks

Abstract

Do peers influence individuals’ involvement in political activism? To provide a quantitative answer, I study Argentina’s abortion rights debate through Twitter, the social media platform. Pro-choice and pro-life activists coexisted online, and the evidence suggests peer groups were not too polarized. I develop a model of strategic interactions in a network allowing for heterogeneous peer effects. Next, I estimate peer effects and test whether online activism exhibits strategic substitutability or complementarity. I create a novel panel dataset where links and actions are observable by combining tweets’ and users’ information. I provide a reduced-form analysis by proposing a network-based instrumental variable. The results indicate strategic complementarity in online activism, both from aligned and opposing peers. Notably, the evidence suggests homophily in the formation of Twitter’s network, but it does not support the hypothesis of an echo-chamber effect.

About the speaker

I am an applied microeconomist with research interests in Political and Development Economics. Broadly speaking, my research analyses how individuals behave and interact, online and offline, in the public sphere. It also explores interconnections between social interactions, political institutions, and social norms. 

My methodological approach is highly eclectic, and I usually combine data analysis with a theoretical framework to guide it. Currently, my research leverages unstructured data from social media platforms. I usually employ techniques from Natural Language Processing (NLP) and the Economics of Networks in my research projects.