简介：Aftersummarizingthetheoriesandmeasurementindicesofassimilation,thispaperexaminesandre-constructsthemeasurementframeworkofassimilationatindividuallevel,followedbydiscussingsometheoreticalquestionsofassimilationinpresentChina.Assimilationcouldbeonepointonthelineconnectingadaptation,segmentedassimilationandassimilation.Measurementindicesframeworkofimmigrantassimilationindestinationshouldbesimplifiedwithhighvalidity,correspondingtothetheories.Assimilationcanbedividedintofivedimensions:economic,cultural,social,structuralandidentity.Futureresearchshouldbedirectedatthefinaldirectionoftheassimilationofmigrants,andthecausalchaincenteredontheassimilation"thestatusandthecausesandconsequencesofassimilations",andlongitudinalorpanelsurveystudiesshouldbeenhancedtounderstandthesituationanddevelopmenttrajectoryofassimilationofmigrantsinChina.

简介：Onthebasisofasimplemodelidentifyingtherelationshipbetweentheagriculturallaborshareintotallaborforceandthedeterminingfactors,suchasnumberofnewparticipatorsto,andthoseleavingfromagricultureandtransferringtonon-farming,thispaperestimatesthecontributionofthedeterminingfactorsforthechangesofagriculturallaborshareduringtheperiod1990～2030.Giventheassumptionabouttheaverageannualdeclineoftheagriculturallaborshareinfuture,thenumberofnewparticipatestoagriculturallaborisestimatedtodeclinefrom20.23millionduring2005～2010to11.42millionduring2010-2030,andthenumbersofleavingandtranferringareestimatedtochangefrom42.20millionand38.43millionto27.04millionand29.49millionrespectivelyduringthesameperiod.Thefactorsofentrance,exitandtransfer,whichcontributetothedeclineoftheagriculturallaborshare,aredescribedtochangefrom-15.1%,34.7%and38.1%respectivelyin2005～2010to-22.6%,54.3%and49.8%in2025～2030.Thenonfarmingjobcreationmaydeclinefrom69.69millionin2005～2010to35.08millionin2025～2030.Thepolicyimplicationsofthefindingarealsodiscussed.