Newspaper Washington, June 21 (Reporter Wang Youran) A new study display，Although the US economy has recovered from the "big recession"，But the fertility rate of women is still declining，This is closely related to the loss of the manufacturing position。

The Demography Journal edited by the American Population Society published on June 18 the paper of Nathan Seltzer, a researcher at the Sociology Department of the University of Wisconsin University of Wisconsin University, " "Later: The polarization and fertility rate of the US labor market continued to decline"。Author Introduction，"Big Torter" caused the United States to lose nearly 9 million jobs，Losses of Family Wealth in the bet365 live casino games U.S. residents is about $ 19 trillion，Rising unemployment rate，A decrease in fertility rates for women。Now，US economic recovery，Employment rate and salary level recovery，But the fertility rate is still declining。In 2018, each American woman has an average of 1.7 children，reach the lowest level in history。This phenomenon confuses researchers，Because of the past data，The fertility rate declined during the economic recession，It will pick up during the period of economic recovery。

To learn more about the relationship between the macroeconomic and fertility rate，Ceze analyzed data in the National Life Statistics System established by the US Disease Control and Prevention Center，The scope of selection is from 1991 to 2014. From the birth rate data of the 381 metropolitan areas in the United States in the United States，Then transform it into a total bet365 best casino games and fertility rate data，The population of these metropolitan areas accounts for 85%of the total US population。BIRTH RATE (BIRTH RATE) refers to the number of newborn population per 1,000 people in a certain period of time (usually 1 year); the total fertility rate refers to the average number of children in a woman's life。Generally speaking，Without migrants without foreign immigrants，The sum of the fertility rate reaches 2.1，can ensure that generations are replaced。

Selze discovery，​​"Big Torter" has accelerated the decline of the manufacturing industry in the United States，This leads to a decrease in fertility rate in the United States。1991-2014 The share of manufacturing in all industries in the United States decreased from 18.3%to 14.2%，The total fertility rates of white women and African women decreased by 0.08 and 0.21 respectively。2006-2014，That is, "Big Bet365 lotto review Torter" before the beginning of the economic recovery，The share of manufacturing in all industries in the United States is reduced by 2.4%，Spanish women's fertility rate decreases by 24%，The fertility rate of other ethnic women is reduced by 7%-8%。Spanish female fertility rate is particularly obviously impactful.，The proportion of people who work in manufacturing are higher than other race/ethnic women。The explanation of the decline in the decline of different races/ethnic American women's total fertility rates reached 25%-50%，The unemployment rate is much lower than the explanation of this。I control the degree of education、Marriage rate and other factors affecting fertility rates，The connection between the manufacturing and fertility rate still exists，Metropolitan area where the manufacturing industry declines,，The decline in the fertility rate of women's fertility, bet365 live casino games the more significant。

Selze said，Considering the proportion of manufacturing in the US economy continues to decrease，The future fertility rate may not return to the level before the "big recession"。The transformation of the economic structure has weakened the financial stability of the workers，shakes their determination to have children，The change in fertility rate will be in the labor market、Social security and other fields generate a series of consequences。Although the manufacturing work is essentially not conducive to family，But in the United States after World War II，Manufacturing provides a stable secondary income position for a large number of low -tech workers。Now，A large reduction in manufacturing positions，Many people have to turn to low salary、Unstable service industry position，Their living situation continues to deteriorate，The fertility bet365 best casino games rate also decreases with it。