//-->
Gross national product, 1909 - 1928 : existing estimates, new estimates and new interpretations of World War I and its aftermath
Romer, Christina, (1987)
Recent changes in the US business cycle
Chauvet, Marcelle, (2001)
Dynamic factor models and fractional integration : with an application to US real economic activity
Caporale, Guglielmo Maria, (2024)
The prewar business cycle reconsidered : new estimates of gross national product, 1869 - 1918
Romer, Christina, (1986)
Spurious volatility in historical unemployment data
Changes in the cyclical behavior of individual production series