Our newspaper, Washington, June 21 (Reporter Wang Youran) A new study shows，Although the U.S. economy has recovered from the "Great Recession"，But the female fertility bet365 horse racing odds is still declining，This is closely related to the loss of manufacturing jobs。

The "Demography" journal edited by the American Demographic Association published online on June 18 a paper ""The Great Recession"" by Nathan Seltzer, a researcher in the Department of Sociology at the University of Wisconsin-Madison. "After: The Polarization of the U.S. Labor Market and the Continuing Decline in Fertility Rates"。Author introduction，The “Great Recession” led to the loss of nearly 9 million jobs in the United States，U.S. household wealth loss is approximately US trillion，Unemployment bet365 horse racing odds rising，Female fertility bet365 horse racing odds decreases。Today，U.S. economic recovery，Employment bet365 horse racing odds and wage level rebounded，But the fertility bet365 horse racing odds is still declining。The average number of births per American woman in 2018 was 1.7 children，Reached all-time low。This phenomenon has researchers puzzled，Because judging from past data，Fertility rates declining during recession，It will pick up during the economic recovery period。

To further understand the relationship between macroeconomics and fertility bet365 horse racing odds，Selzer analyzed data from the U.S. National Vital Statistics System established by the Centers for Disease Control and Prevention，The selected range is birth bet365 horse racing odds data for 381 metropolitan areas in the United States from 1991 to 2014，This is then converted into total fertility bet365 horse racing odds data，These metropolitan areas account for 85% of the U.S. population。Birth bet365 horse racing odds refers to the number of newborns per 1,000 people in a certain period of time (usually 1 year)；Total fertility bet365 horse racing odds refers to the average number of children a woman has in her lifetime。Generally speaking，Without immigrants，The total fertility bet365 horse racing odds reaches 2.1，In order to ensure the replacement of generations。

Selzer discovered，The “Great Recession” accelerated the decline of U.S. manufacturing，This in turn leads to a decrease in the fertility bet365 horse racing odds of American women。The share of manufacturing in all U.S. industries from 1991 to 2014 increased from 18.3% reduced to 14.2%，The total fertility bet365 horse racing odds of white women and African-American women in the United States decreased by 0.08 and 0.21。2006-2014，That is, before the beginning of the "Great Recession" to the period of economic recovery，Manufacturing’s share of all U.S. industries decreased 2.4%，24% lower fertility bet365 horse racing odds among Hispanic women，The fertility bet365 horse racing odds of women of other ethnic groups decreases by 7%-8%。One reason why Hispanic women’s fertility bet365 horse racing odds is particularly affected is，A higher percentage of them work in manufacturing than women of other racial/ethnic groups。The decline of manufacturing explains 25%-50% of the decline in total fertility rates among U.S. women by race/ethnicity，The unemployment bet365 horse racing odds explains this much less strongly。After controlling for education level、After marriage bet365 horse racing odds and other factors that affect fertility bet365 horse racing odds，The link between manufacturing and fertility rates persists，In metropolitan areas where the decline in manufacturing is more severe，The decline in female fertility bet365 horse racing odds is more significant。

Selzer said，Considering that the proportion of manufacturing in the U.S. economy continues to decrease，The fertility bet365 horse racing odds may not return to pre-Great Recession levels in the future。Economic structural transformation weakens workers’ financial stability，Shaken their determination to have children，And fertility bet365 horse racing odds changes will occur in the labor market、A series of consequences in social security and other fields。Although manufacturing jobs are not inherently family-friendly，But in the United States after World War II，The manufacturing industry provides stable middle-income jobs for a large number of low- and medium-skilled workers。Today，Significant reduction in manufacturing jobs，Many people have to turn to low wages、Unstable service industry jobs，Their living conditions continue to deteriorate，The fertility bet365 horse racing odds also decreased。