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32 5 2008 9 Vol1 32 , No15 September 2008 67Population Research: 3 2005 , ,,;;, ,, :;;; ,,;, :7100491 ,,( W. J . ,1998) ,,,,(,1991) ,, (,2005) ,(,2005) ,, , ,,(,1995 ;,2002 ;,2005) , (,2006) ,,(,1997) , (,2006) ,, 3 ( NCET 07 0668) ( 70671083) ) ; 985 ( 07200701) Santa Fe Institute

68 32 ,( Social Network) ,(,2001) () ,,(Massey et al1 , 1998 ;,2003 ;,2004) ;, ,,(Massey et al ,1987 ;, 2003 ;,2007a ,2007b) , ,(,2005 ;,2005 ;Bongaart s andWat kins , 1996 ; Friedkin , 1997 ; Eklund , 1999 ; Kohler et al1 , 2001) ,,,(,2002 ;,2005) , 2005 ,,, (,2006) 2 211 ,, 21211 ,, :,,;,( Kohler &Behrman et al1 ,2001) ,, ,,,,,, (Bott ,1971) ( Granovetter ,1973) :,,;, ,;,,

5 : 69,(Lin ,1982 ;,2003 2005) ,(,2002) ,, ,,,(Carrington , 1988 ; Bongaart s and Wat kins , 1996 ; Friedkin , 1997 ; Kohler et al1 , 2001 ; Montgom2ery et al1 , 2001 ; Ataca and Berry , 2002) ,:H1 :, H111 :, H112 :, H113 :, 21112 (2003) ,,,,(,2001) , ,( Sauvy ,1966) ,, , ,, :() () :, ;,; ,,(,2005 ; ,2001) ,,,, (,2001) ,(,2001) ,,, :,,

70 32 ,,:H2 :,,H211 :, H212 :, H213 :, H214 :, 21113 ,,, ,,1 212 1 2005 4 15 ,:, ; , 10 ,8 ,1739 ,,, (,2005)

5 : 71213 ,Ordinal , 21311 () ?, , 1 ,2 , 321312 (1) () ,1 0 ( ) ,,(1) := n I i A i (1)i(1) : Ii i , ,5 4 3 2 1 ; A i i , ,- 2 - 1 0 1 2 , n ,() () () () ,(2) : ,, , (3) :2425 34 35 ;: ,24 () , 1 () () ;2 ,,;3 2 ,, 3 311 31111

72 32 1 1 ,, ,,,,L R ,1 L R (1729) 211 5 6118 141 8 118 011 3 3 3(1738) 181 3 5311 241 7 316 013:2005 :,; 3 3 3 p < 01001 31112 % 2 :,;1 ,;,,,2 L R (1723) 351 3 5716 517 113 011 3 3 3(1738) 341 1 5411 919 117 012:1 : 3 3 3 p < 01001 312 31211 3 3 () 01 76 0143 01 02 0112() 01 84 0136 01 01 0110() 01 14 0134 11 56 1106 51 67 4172() 01 43 0149 01 09 0129%

5 : 73 () 01 33 0147 01 25 0143() 01 19 0139 01 79 0141() 01 49 0150(024) 2534 01 40 0149 35 01 33 0147() (1738 3 ) 01 58 0149 01 29 0146() 01 68 0147(1663 3 ) 31 07 0128 1739:1 3 ,1739 3,,,,,2 %1 %,,1156 ,6 ,,1/ 4,1/ 3 , 31212 4 4 ,,,,,,,4 Ordinal 1 2 3() 01 019 - 01 090 - 01143 01 215 3 3 3 01 193 3 3 3 01195 3 3 3() - 11 063 3 3 3 - 11 025 3 3 3 - 11011 3 3 3 11 259 3 3 3 11 302 3 3 3 11159 3 3 3

74 32 1 2 3 01008 01011() 01542 3 3 3 01491 3 3 3 01235 01223() 01020 01021 01232 + 01222 +() 01510 01647 + 01320 01478() - 01313 3 3(024) 2534 01250 35 - 01169() - 01143 - 01082() 01110(log) 01114- 2LL 216153 3 3 3 1711112 3 3 3 2115117 3 3 3 1738 1738 1738:1 : 3 3 3 p < 01 001 , 3 3 p < 0101 , + p < 011 42 1 , ,:,;3 2 ,, ,, ,,,,:,;;,,H111 ,(14 %) ,H1 ,

5 : 75H2 31213 5 5 ,1 ,,,, ,,,,,,5 Ordinal 1 2 3() - 01241 - 01298 - 01 230 01159 3 01176 3 3 01 182 3 3() - 11322 3 3 3 - 11375 3 3 3 - 11 314 3 3 3 01938 3 3 11149 3 3 3 11 043 3 3 01038 3 3 01 041 3 3() 01302 + 01 281 + 01156 01 327() - 01101 01 017 - 01344 + - 01 182() 11228 + 11 299 + 11353 + 11 482 3() - 01 565 3 3 3(024) 2534 35 - 01200() - 01 080 - 01 387() - 01 122(log) - 01 701 3- 2LL 155151 3 3 3 1037133 3 3 3 12711 81 3 3 3 1737 1737 1737:1 3 3 3 p < 01001 , 3 3 p < 0101 , 3 p < 01 05 , + p < 01 1 2 1 ,,

76 32 ,;,; ,,,3 ,,, ,,,;,,,,,,13 , ,H111 ,,;H1 ,H2 4 , ,,Ordinal ,, :,,,, ; ,,;,,,,,, ,(,2005 ; , 2005 ; Bongaart s and Wat kins , 1996 ; Friedkin , 1997 ; Eklund , 1999 ; Kohler et al1 ,2001) ,,,, ,, ,,,,,,,, ,

5 : 77,;,, ,,,,, ,, :1 1 (1990 - 1999)1 : ,20012 1 1 ,2003 ;33 1 1 ,1997 ;34 1 :1 ,2006 ;15 1 1 ,1995 ;36 , , , , 1 :1 ,2005 ;57 1 1 ,2003 ;28 1 1 :,20059 1 : 1 :, 200110 ,,,1 1 () ,2007a ;111 ,,,. :1 ,2007b ;112 1 1 ,1991 ;313 1 1 200514 1 1 ,2005 ;1115 1 1 ,2005 ; 316 ,,1 1 () ,2005 ;317 1 1 () ,2005 ;118 1 1 ,2002 ;219 1 1 ,2002 ;1120 1 1 ,. 1 :, 200121 W1J . 1 1 ,199822 . 1 ,2001 ;323 1 : 1 http :/ / www1cass1 net1cn 200324 ,1 1 ,2004 ;225 ,,,. . ,2006 ;6

78 32 26 1 1 ,2002 ;427 Ataca B , Berry , J W1 20021 Psychological , sociocultural , and marital adaptation of Turkish immigrant couples inCanada1 I nternational J ournal ofPsycholog y3728 Bongaarts J . & Watkins SC1 19961 Social interactions and contemporary fertility transitions1 Pop ulation and De2velopment Review12229 Bott E1 19711 Family and social network : roles , norms , and external relationships in ordinary urban families 1New York : The Free Press30 Carrington P1 19881 Network as personal communities1 In Wellman & Berkowitz (ed1 ) S ocial S t ructure : A N et2w ork A p p roach1 New York31 Eklund , L1 19991 Gender roles and female labor migration : A qualitative field study of female migrant workers inBeijing1 Report f rom a M inor Fiel d S tud y :May - J uly32 Friedkin , N E , Johnsen , Eugene C1 19971 Social positions in influence networks1 S ocial N etw orks19 : 209 - 22233 Granovetter M1 19731 The strength of weak ties1 A merican J ournal of S ociology . 78 (6)34 Kohler , Hans - Peter , J1 R1 Behrman , S1 C1 Watkins1 20011 The density of social networks and fertility deci2sions : Evidence from South Nyanza District , Kenya1 Demog ra phy38 (1)35 Lin Nan1 19821 S ocial Resources and I nst rumental A ction , S ocial S t ructure and N etw ork A nal ysis , edited by Pe2ter V1 Marsden and Lin Nan1 Sage Publications36 Massey D. S. R1 19871 Returnt to Aztian1 The S ocial Process of I nternational M i g ration f rom WesternMex ico1Berkeley and Los Angeles : University of California Press37 Massey D1 S1 R1 , Arango J1 , Hugo G1 , et al1 19981 W orl ds in Motion1 Understanding I nternational M i g rationat the End of the M illenni um1 Oxford : Clarendon Press , 42 - 4338 Montgomery MR , Kiros GB , Agyeman , et al1 20011 Social Networks and Contraceptive Dynamics in SouthernGhana1 Population Council , New York , Policy Research Division W orking Paper 15339 Sauvy , A1 19661 General Theory of Population1 New York : Basic Books , Inc1Rural Migrant Workerπs Attitudes Towards Pre2marital and Extramarital Sexual Behaviors : A study of Social NetworksAbstract :Using survey data of rural migrant workers in Shenzhen in 2005 , this paper analyzes effects of social networkson rural migrant workersπattitudes towards pre2marital pregnancy and extra2marital sexual behaviors1 The results showthat social networks is the key approach to change their marriage and sex attitudes , and number and attitudes of net2work members have significant effects on their attitudes towards pre2marital pregnancy and extra2marital sexual behav2iors1 The better the rural migrants integrate to the urban society , the closer their attitudes to those of permanent urbanresidents1 Compared with male rural migrants , female rural migrants are less likely to accept pre2marital pregnancy andextra2marital sexual behaviors1 Modernization of their marriage and sex attitudes helps their social integration into theurban society in terms of culture and value but might stimulate the occurrence of pre2marital pregnancy and extra2maritalsexual behaviors1Key Words : Rural migrant workers ; Social networks ; Pre2marital sexual behaviors ; Extra2marital sexual behaviorsAuthors :Jin Xiaoyi is Professor , Institute of Population and Development Studies , School of Public Policy and Manage2ment , Xiπan Jiaotong University ; Ren Feng and Yue Zhongshan are PhD Students , School of Public Policy and Manage2ment , Xiπan Jiaotong University.(: :2008 - 05)