psychophysiological mechanisms 1 verbete psychophysiological stress 1 verbete public educational policies. 1 verbete punctuated equilibrium model of organizational change 1 verbete purchasing 1 verbete PPP (Purchasing Power Parity) 1 verbete push and pull factors 1 verbete quantitative linguistics 1 verbete quantum zeno effect 1 verbete quasi-monopoly 1 verbete quasilinearization method 1 verbete race condition 1 verbete raciolinguistics 1 verbete radiomics 1 verbete random forest algorithm 1 verbete randomized clinical trial 1 verbete RISF (Rapidly Internationalizing Service Firm) 1 verbete raster cell 1 verbete readability 1 verbete reading skills 1 verbete