“…A number of research studies (Weintraub, 1962;Adelman, 1963;Heer, 1966;Ekanem, 1972;Massey and Tedrow, 1976:435) support a relationship in which fertility decline responds to mortality decline. Other studies have not discovered such a relationship (Knodel and Van de Walle, 1979;Coale, 1970;Chang et al, 1979 ;Janowitz, 1971Janowitz, , 1973aJanowitz, , 1973b. A critical examination of the demographic literature led Preston (1978) to oppose the postulate of demographic transition, concluding that mortality levels at either macro or micro levels of analysis cannot explain fertility rates and that declining mortality levels are not a factor leading to adoption of fertility control (Runstadter, 1979:71;Chang et al,, 1979:45).…”