Evangelical church growth during economic recessions

According to the Economist :

Last year David Beckworth, an assistant professor of Economics at Texas State University, examined historic patterns in the size of evangelical congregations and found that, during each recession cycle between 1968 and 2004, membership of evangelical churches jumped by 50%.

In 2008, David Gibson wrote in Commonweal:

A recent spot check of some large Roman Catholic parishes and mainline Protestant churches around the nation indicated attendance increases there, too. But they were nowhere near as striking as those reported by congregations describing themselves as evangelical, a term generally applied to churches that stress the literal authority of Scripture and the importance of personal conversion, or being born again.Part of the evangelicals new excitement is rooted in a communal belief that the big Christian revivals of the 19th century, known as the second and third Great Awakenings, were touched off by economic panics. Historians of religion do not buy it, but the notion has always lived in the lore of evangelism, said Tony Carnes, a sociologist who studies religion.A study last year may lend some credence to the legend. In Praying for Recession: The Business Cycle and Protestant Religiosity in the United States, David Beckworth, an assistant professor of economics at Texas State University, looked at long-established trend lines showing the growth of evangelical congregations and the decline of mainline churches and found a more telling detail: During each recession cycle between 1968 and 2004, the rate of growth in evangelical churches jumped by 50 percent. By comparison, mainline Protestant churches continued their decline during recessions, though a bit more slowly.The little-noticed study began receiving attention from some preachers in September, when the stock market began its free fall. With the swelling attendance they were seeing, and a sense that worldwide calamities come along only once in an evangelists lifetime, the study has encouraged some to think big.