PT - JOURNAL ARTICLE AU - Fabozzi, Frank J. AU - Koedijk, Kees TI - Editors’ Introduction to the Special Issue on Investment Models AID - 10.3905/jpm.2021.47.5.001 DP - 2021 Mar 31 TA - The Journal of Portfolio Management PG - 1--5 VI - 47 IP - 5 4099 - http://jpm.pm-research.com/content/47/5/1.short 4100 - http://jpm.pm-research.com/content/47/5/1.full