Funds from this grant provide three years of support for the continued development of QuantEcon.org, an online resource for code, data, tutorials, and lectures on quantitative economic modeling. The brainchild of economists John Stachurski of Australian National University and Thomas Sargent of New York University, QuantEcon provides open source modules for economists seeking to model a variety of economic phenomena, covering topics from asset pricing to optimal savings. Grant funds will support a variety of improvements to the site, including the addition of 20 new lectures, an innovative data portal, an open notebook archive, and expanded code libraries. Additional funds will support efforts to move the site toward independent sustainability and to connect its offerings to other economic research institutions. Funds for the development of QuantEcon have been granted to NUMFocus, a nonprofit organization that provides administrative, operational, and strategic support to scientific software projects.