Another interesting finding to emerge from Table 3 is that the rise in average age at marriage for West Java Muslims in the decade prior to 1990 was largely the result of a rise in age at marriage in the Botabek region surrounding Jakarta, presumably largely as the result of in-migration of Muslims from areas with a tradition of higher age at marriage.
Priangan: all remaining kabupaten and kotamadya of West Java excluding the Botabek region.
However, the increasingly tight competition among Jakarta's retailers subsequently forced supermarkets to expand their business by establishing outlets in Botabek
(Bogor-Tangerang-Bekasi), an region which serves as the buffer zone for Jakarta.
As a result, the growth of Botabek
has been boosted by that of Jakarta.