The Effect of HRM Practices and R&D Investment on Worker Productivity

Fredrik Andersson, Clair Brown, Benjamin Campbell, Hyowook Chiang, and Yooki Park, The Analysis of Firms and Employees: Quantitative and Qualitative Approaches (University of Chicago Press, 2008), chap. 1, https://www.nber.org/books-and-chapters/analysis-firms-and-employees-quantitative-and-qualitative-approaches/effect-hrm-practices-and-rd-investment-worker-productivity.