Quality-of-Life Solver for "Measuring Quality of Life under Spatial Frictions" R package ABRSQOL version 1.0.0 This toolkit implements a numerical solution algorithm to invert a quality of life measure from observed data. Unlike the traditional Rosen-Roback measure, this measure accounts for mobility frictions—generated by idiosyncratic tastes and local ties — and trade frictions — generated by trade costs and non-tradable services, thereby reducing non-classical measurement error. The QoL measure is based on Ahlfeldt, Bald, Roth, Seidel (2024) <https://econpapers.repec.org/RePEc:boc:bocode:s459382> "Measuring Quality of Life under Spatial Frictions". When using this programme or the toolkit in your work, please cite the paper. Software Depends: R (>= 3.5.0) Suggests: testthat (>= 3.0.0) Max von Mylius <max.mylius@hu-berlin.de> Comprehensive R Archive Network (CRAN) Gabriel M Ahlfeldt [cph, aut] (Humboldt University of Berlin), Fabian Bald [aut] (European University Viadrina), Duncan Roth [aut] (Institute for Employment Research), Tobias Seidel [aut] (University of Duisburg-Essen), Max von Mylius [trl, cre] (Humboldt University of Berlin) MIT + file LICENSE (https://CRAN.R-project.org/package=ABRSQOL/LICENSE) 2024-11-06 application/tgz https://CRAN.R-project.org/package=ABRSQOL doi:10.32614/CRAN.package.ABRSQOL