This paper presents estimates of indexes of internal returns to scale
and external economies for two-digit manufacturing industries in Taiwa
n. Estimating the returns to scale indexes involves using both SUR and
3SLS estimation procedures. The data strongly support the presence of
external increasing returns to scale. The findings indicate no eviden
ce of internal increasing return in all two-digit manufacturing indust
ries. According to the endogenous growth literature, the existence of
externalities in production bears important economic implications in s
ome aspects of economic growth, even though the data cannot distinguis
h the transmission mechanism.