Abstract
Innovation is one of the most important driving forces of ICT industries, the leading industry of the Korean economy, and agglomeration economies are known to have positive impacts on innovation. The evolutionary agglomeration theory, however, suggests that the effects of agglomeration economies may vary depending on the life cycle of an industry. This study investigates how agglomeration economies have affected the innovation of the ICT manufacturing sector over its life cycle in the Seoul Capital Area (SCA), South Korea. A panel data set for patent applications during the period 2001–2013, which falls into the birth stage (2001–2003), the growth I (2003–2006) and II (2006–2009) stages, and the maturity stage (2009–2013), is used to model innovation in terms of various types of agglomeration economies. The results show that the types of agglomeration economies that have significant impacts on innovation vary over the life cycle of the industry: while local industrialization has a positive impact only in the birth stage, diversity has positive impacts in all the stages except the growth II stage. While large firms’ leading has a positive impact only in the growth II stage, competition among small firms has a positive impact only in the birth stage. This implies that different strategies for agglomeration are needed over the life cycle in order to sustain innovation in ICT manufacturing.
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Notes
- 1.
- 2.
For multiple dimensions of agglomeration economies in general, see Park and von Rabenau (2011). They disentangle the externalities of agglomeration by agent, source, and spatial dependence.
- 3.
The ICT manufacturing sector in this study refers to the industries assigned to the code C26 (manufacture of electronic components, radio, television, and communication equipment and apparatuses) by the Korean Standard Industrial Classification (KSIC), Rev. 9, which includes the manufacture of semiconductor (C261), electronic components (C262), computers and peripheral equipment (C263), telecommunication and broadcasting apparatuses (C264), electronic video and audio equipment (C265), and magnetic and optical medium (C266).
- 4.
ICT manufacturing here refers to the industries assigned to the International Standard Industrial Classification (ISIC), Rev. 4 codes 261, 262, 263, and 268.
- 5.
The exchange rate 1 USD = 1095.6 KRW is applied.
- 6.
The other measure suggested by Crépon et al. (1998) is the share of innovative sales.
- 7.
If it is not defined otherwise, innovation refers to the degree of innovativeness in this study.
- 8.
The omitted six municipalities are Gapyeong-gun, Yeonsu-gu, Yangpyeong-gun, Yeoncheon-gun, Ganghwa-gun, and Ongjin-gun.
- 9.
For an application, two addresses are reported: inventor’s and applicant’s. As the addresses for inventors include only those of the registered inventors such as institutions, we use the more comprehensive applicants’ addresses.
- 10.
The level of significance may go up if we expand the time range back to the 1990s, as the earlier period within the birth stage may see higher effects of localization than the later.
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Appendix 1: Descriptive Statistics
Appendix 1: Descriptive Statistics
Variable | Mean | Std. dev. | Min. | Max. | Time periods | Number of obs. | |
---|---|---|---|---|---|---|---|
innov | Period 1 | −3.017629 | 1.513923 | −5.639145 | 2.140066 | 3 | 180 |
Period 2 | −2.744071 | 1.537157 | −5.669881 | 1.676803 | 4 | 240 | |
Period 3 | −2.18766 | 1.680219 | −5.512291 | 2.872134 | 4 | 240 | |
Period 4 | −1.906382 | 1.857345 | −6.529544 | 3.351682 | 5 | 300 | |
Whole | −2.389176 | 1.742652 | −6.529544 | 3.351682 | 13 | 780 | |
clu | Period 1 | 1.672744 | 3.234111 | .0000933 | 21.42845 | 3 | 180 |
Period 2 | 1.46516 | 3.051903 | .0000933 | 23.72123 | 4 | 240 | |
Period 3 | 1.473138 | 3.324267 | .0002175 | 25.09793 | 4 | 240 | |
Period 4 | 1.412657 | 3.212534 | .0001718 | 23.02446 | 5 | 300 | |
Whole | 1.493706 | 3.191456 | .0000933 | 25.09793 | 13 | 780 | |
div | Period 1 | 33.04492 | 7.313514 | 19.15775 | 47.08056 | 3 | 180 |
Period 2 | 34.50096 | 8.137966 | 16.69818 | 56.76448 | 4 | 240 | |
Period 3 | 39.81731 | 8.535121 | 17.6746 | 57.33545 | 4 | 240 | |
Period 4 | 40.06973 | 8.416427 | 18.48906 | 59.19137 | 5 | 300 | |
Whole | 37.25466 | 8.711706 | 16.69818 | 59.19137 | 13 | 780 | |
div_mfg | Period 1 | 13.95222 | 6.362514 | 3.115928 | 27.11503 | 3 | 180 |
Period 2 | 13.00141 | 5.893449 | 3.013242 | 24.4449 | 4 | 240 | |
Period 3 | 12.33691 | 5.896666 | 2.765624 | 26.09841 | 4 | 240 | |
Period 4 | 11.60668 | 5.823097 | 2.727195 | 27.13635 | 5 | 300 | |
Whole | 12.56633 | 6.044792 | 2.727195 | 27.13635 | 13 | 780 | |
div_ict | Period 1 | 2.779748 | .7884301 | 1 | 4.680952 | 3 | 180 |
Period 2 | 2.617045 | .7718202 | 1 | 4.717073 | 4 | 240 | |
Period 3 | 2.695144 | .829697 | 1 | 5.30042 | 4 | 240 | |
Period 4 | 2.662623 | .8617387 | 1 | 5.30042 | 5 | 300 | |
Whole | 2.684715 | .8224017 | 1 | 5.30042 | 13 | 780 | |
compe | Period 1 | 2.431592 | 2.497128 | .1219435 | 17.69739 | 3 | 180 |
Period 2 | 2.709811 | 2.337954 | .0978488 | 15.89858 | 4 | 240 | |
Period 3 | 3.349214 | 2.949074 | .0839257 | 15.89858 | 4 | 240 | |
Period 4 | 3.923562 | 3.34462 | .0907789 | 17.99758 | 5 | 300 | |
Whole | 3.215274 | 2.960445 | .0839257 | 17.99758 | 13 | 780 | |
large | Period 1 | .2021439 | .2691816 | 0 | .8920141 | 3 | 180 |
Period 2 | .1915671 | .2825242 | 0 | .9456964 | 4 | 240 | |
Period 3 | .1604602 | .2770371 | 0 | .926899 | 4 | 240 | |
Period 4 | .1486172 | .2710214 | 0 | .9233746 | 5 | 300 | |
Whole | .1715199 | .2745515 | 0 | .9456964 | 13 | 780 | |
emp_rat | Period 1 | .3693149 | .3609731 | .1398799 | 2.780034 | 3 | 180 |
Period 2 | .377474 | .3661295 | .1502432 | 2.780034 | 4 | 240 | |
Period 3 | .3946322 | .3734753 | .1502432 | 2.843038 | 4 | 240 | |
Period 4 | .424876 | .3850713 | .1583888 | 2.902833 | 5 | 300 | |
Whole | .3967908 | .3736912 | .1398799 | 2.902833 | 13 | 780 | |
ln_ictemp | Period 1 | 7.271445 | 1.718777 | .6931472 | 10.32246 | 3 | 180 |
Period 2 | 7.218343 | 1.71977 | 2.079442 | 10.41286 | 4 | 240 | |
Period 3 | 6.890221 | 1.871622 | 2.302585 | 10.38659 | 4 | 240 | |
Period 4 | 6.703199 | 2.006158 | 2.302585 | 10.39336 | 5 | 300 | |
Whole | 6.980718 | 1.866508 | .6931472 | 10.41286 | 13 | 780 | |
res_rat | Period 1 | .0023691 | .0051609 | 0 | .0393788 | 3 | 180 |
Period 2 | .0031187 | .0070078 | 0 | .041866 | 4 | 240 | |
Period 3 | .0048024 | .0101581 | 0 | .0626197 | 4 | 240 | |
Period 4 | .0058194 | .0123113 | 0 | .087643 | 5 | 300 | |
Whole | .0042705 | .0096597 | 0 | .087643 | 13 | 780 | |
ln_pop | Period 1 | 12.64271 | .6366047 | 11.16087 | 13.84792 | 3 | 180 |
Period 2 | 12.6699 | .6375497 | 11.0101 | 13.88215 | 4 | 240 | |
Period 3 | 12.70115 | .6364824 | 11.0101 | 13.88611 | 4 | 240 | |
Period 4 | 12.73901 | .6271121 | 11.16447 | 13.95367 | 5 | 300 | |
Whole | 12.69629 | .633718 | 11.0101 | 13.95367 | 13 | 780 |
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Park, I.K., Kim, G. (2016). Innovation of ICT Manufacturing and Agglomeration Economies: Evolution over the Life Cycle. In: Kim, E., Kim, B. (eds) Quantitative Regional Economic and Environmental Analysis for Sustainability in Korea. New Frontiers in Regional Science: Asian Perspectives, vol 25. Springer, Singapore. https://doi.org/10.1007/978-981-10-0300-4_4
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