You find below a list of small grants that are ideal for graduate students in economics and related fields. Please let us know if you have others to add or if any information needs to be updated.
Grant opportunities
Time-sharing Experiments for the Social Sciences (TESS) offers researchers the opportunity to capture the internal validity of experiments while also realizing the benefits of working with a large, diverse population of research participants.
https://www.tessexperiments.org/
Small Grants in Behavioral Economics (BE)
Research that uses behavioral insights from psychology, economics, sociology, political science and other social sciences to examine and improve social and living conditions in the United States
Small Grants in Computational Social Science (CSS)
Innovative social science research that utilizes new data and methods to advance our understanding of the research issues that comprise its core social science programs in Social Inequality, Behavioral Economics, Future of Work, and Race, Ethnicity and Immigration.
http://www.russellsage.org/how-to-apply/small-grants
DDRIG awards provide funds for items not normally available through the student's university such as enabling doctoral students to undertake significant data-gathering projects and to conduct field research in settings away from their campus. DDRIGs do not provide cost-of-living or other stipends or tuition.
https://www.nsf.gov/funding/pgm_summ.jsp?pims_id=5437&org=NSF
The Center funds rresearch investigating the various channels through which economic inequality may (or may not) impact economic growth and stability, both directly and indirectly.
The Mellon International Dissertation Research Fellowship (IDRF) offers nine to twelve months of support to graduate students in the humanities and humanistic social sciences who are enrolled in PhD programs in the United States and conducting dissertation research on non-US topics.
You can consult this page for an extensive list of other grant opportunities (current or past). The list is curated by Anne Byrne (Cornell University)