PRB Topic Feed: Population Dynamics/Topics/PopulationDynamics.aspxWho Votes in America?As the U.S. presidential election draws closer, the candidates are paying attention to key demographic groups. But which groups are likely to cast votes in the presidential election? (Note: This article was written prior to the 2000 presidential election.) 10/01/2000/Publications/Articles/2000/WhoVotesinAmerica.aspx65d2508a-8845-4adc-9115-b0ab3f9be946How Many People Have Ever Lived on Earth?How many people have ever lived on Earth? PRB's estimate is about 108 billion people. 10/07/2011/Publications/Articles/2011/HowManyPeopleHaveEverLivedonEarth.aspx0ea2c7ca-3c43-463a-922f-4084b62cae61How Many People Have Ever Lived on Earth?Any estimate of the total number of people who have ever been born will depend on two factors: the length of time humans are thought to have been on Earth and the average size of the human population at different periods.10/07/2011/Publications/Articles/2002/HowManyPeopleHaveEverLivedonEarth.aspx08edadfa-fa9d-4e0d-90f4-6dd952680ba5The U.S. Birth Rate Falls FurtherThe U.S. total fertility rate has been revised: the United States is no longer the only industrialized country with fertility above replacement level. Perhaps the new estimate of the U.S. TFR and the sagging U.S. economy, which may further reduce the birth rate, will narrow this gap soon. 06/30/2003/Publications/Articles/2003/TheUSBirthRateFallsFurther.aspxfca31e9a-cf4a-4dcd-b3ea-b2d653bfced5Iran's Demographic Dividend and the Implications of the Nuclear DealThis article by Farzaneh Roudi, program director for the Middle East and North Africa at PRB, was published in the Georgetown Journal of International Affairs. 12/04/2015/Publications/Articles/2015/iran-demographic-dividend.aspxcf1e8c3c-ea19-4cd2-9ef2-8f8d8fb49e57Looking Back at the Century of PopulationExperts from around the world identify the most important population trends and events of the 20th century.01/01/2000/Publications/Articles/2000/LookingBackattheCenturyofPopulation.aspxe21660a9-e469-4f27-bd90-2aa2a60ba9a2Racial Differences in Health Status and Health Insurance Coverage in the United StatesJames B. Kirby and Toshiko Kaneda&nbsp;explore how long individuals are expected to live with different types of health insurance coverage and in different health states throughout their lives.03/09/2011/Publications/Articles/2011/us-health-insurance-racial-differences.aspxc8418d5a-35fd-4eec-8e3d-46b5353fce86Alfred Lotka, Mathematical DemographerAlfred J. Lotka's work on the mathematics of stable populations was "the greatest single contribution to population theory."03/01/2000/Publications/Articles/2000/AlfredLotkaMathematicalDemographer.aspxb5616fa9-0db2-4329-a034-8eb13951629cHow People in India <i>Really</i> LiveMost houses in India are constructed of mud and have dirt floors and very few households have computers or cars. 12/18/2008/Publications/Articles/2008/howindianslive.aspxc0bc844d-4c52-4c8b-bc7f-1c3b4e43e0e3Back to the Future: Guy Irving Burch and the (Surprisingly Modern) Demographic World of the 1930sAfter a 50-year post-World War II interlude, we have gone back in many respects to the trends and dynamics that marked the world of PRB's founder. 12/01/2005/Publications/Articles/2005/BacktotheFutureGuyIrvingBurchandtheSurprisinglyModernDemographicWorldofthe1930s.aspx944c757c-c7c3-41de-b3ae-9f744294861c