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ID:41287400
大小:1.27 MB
页数:17页
时间:2019-08-21
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1、TheoriesOfMigrationIBSLModelsRavenstein’sLawsOfMigrationNewton’sGravityModelZelinsky’sModelOfMobilityTransitionClark’sModelOfMigrationDecisionLee’sInterveningObstaclesModelStouffer’sLawOfInterveningOpportunitiesActivity6theoriesofmigrationaregoingtobediscussed...Copythefollowingtable
2、andentertheStrengthsandWeaknessesforeachtheorythroughoutthediscussionofeach:TheoriesOfMigrationRavensteinNewtonZelinskyClarkLeeStoufferADRavenstein’sLawsOfMigrationEverymigrationflowgeneratesareturnorcountermigration.Themajorityofmigrantsmoveashortdistance.Migrantswhomovelongerdistan
3、cestendtochoosebig-citydestinationsUrbanresidentsareoftenlessmigratorythaninhabitantsofruralareas.Familiesarelesslikelytomakeinternationalmovesthanyoungadults.OtherInfluencesInclude:MigrationstagebystageMigrationandTechnologyEconomicconditionRavensteinMostmigrantstravelshortdistances
4、andtheirnumbersdecreaseasdistanceincreasesNewton"Anytwobodiesattractoneanotherwithaforcethatisproportionaltotheproductoftheirmassesandinverselyproportionaltothesquareofthedistancebetweenthem.“Whenusedgeographically,thewords'bodies'and'masses'arereplacedby'locations'and'importance'res
5、pectively,whereimportancecanbemeasuredintermsofpopulationnumbers,grossdomesticproduct,oranotherappropriatevariables.Thegravitymodelofmigrationisthereforebasedupontheideathatastheimportanceofoneorbothofthelocationincreases,therewillalsobeanincreaseinmovementbetweenthem.Thefartherapart
6、thetwolocationsare,however,themovementbetweenthemwillbeless.ZelinskyStage1oftheDTM:PreindustrializedeconomiesEconomiesthathavenotyetdevelopedaremadeupofruralcountriesandsubsistencefarmers.TherewillonlybeRural–Urbanmigrationbetweenthesettlements,ifatall,astherearefewurbanareas.Industr
7、ializingcountriesAscountriesstarttoindustrialize(UKinthe18th&19thcentury)thereisincreasedmigrationfromthecountrysidetothecitieswheretherewerebetterwagesandanincreaseinthestandardsofliving.Stage4oftheDTM:PostindustrialeconomiesAdvancedcountriesthatrelyontertiaryindustrymorethanseconda
8、ryindustrysh
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