TY - CHAP A1 - Lesthaeghe, R. A1 - Vanderhoeft, C. T1 - Ready, willing, and able: A conceptualization of transitions to new behavioral forms Y1 - 2001 A3 - Casterline, J. T2 - Diffusion processes and fertility transition: Selected perspectives CY - Washington, D.C PB - National Research Council ER -