Welcome! I am Johanna Isman, a Ph.D. candidate at the Toulouse School of Economics.

My primary research fields are environmental economics and empirical industrial organization. I am interested in studying the effectiveness of private and public policies tackling environmental, economic, and social issues in global value chains. My current work explores the economics of voluntary certification. I focus on the effectiveness of voluntary certification in regulating environmental externalities, such as the protection of carbon stock and biodiversity.

You can access my CV here and contact me at johanna.isman [at] tse-fr.eu.


Emmanuelle Auriol
Toulouse School of Economics
emmanuelle.auriol [at] tse-fr.eu

St├ęphane Straub
World Bank
sstraub [at] worldbank.org

Mathias Reynaert
Toulouse School of Economics
mathias.reynaert [at] tse-fr.eu

Eduardo Souza-Rodrigues
University of Toronto
e.souzarodrigues [at] utoronto.ca