出口中介商是指在國際貿易中，專門幫助製造商將其產品銷售到國外市場的廠商，因此出口中介商在國外研究中一直是一個備受矚目的議題，而對於是否選擇使用出口中介的服務不僅會受到出口目標國的特性影響，也會受到產品本身的性質與特徵的影響。本文使用了臺灣財政部提供之2007年至2019年的海關資料與廠商報稅資料，並將資料整合為產品－國家層級的形式，藉此計算出某產品出口到某特定國家使用出口中介的比例，以此去探討台灣使用出口中介的情形。我們以產品特徵（產品異質性、產品內出口批發商的集中度）與出口目的國特徵（GDP、人均GDP、距離）作為主要的研究變數，並利用時間固定效果模型進行分析，接著進一步的在時間固定效果之下分別加入國家固定效果或部門固定效果，發現出口目的國市場越大越不傾向使用出口中介的服務，而與出口目標國距離的遠近則會因為出口中介商出口額佔總出口比例的不同而有不同的影響，此外當異質性產品該比例較高。另外因為臺灣特殊的產業型態與出口樣態，故本文還將財貨類別進行分類與分析。依據廣義經濟分類將貨品分為兩大類: 消費財與工業財 (中間財加資本財)；亦可分為電子產品與非電子產品，我們發現在這些不同的樣本之下出口目的國特性會對使用出口中介的比例產生不同程度的影響，至於產品特徵的部分在電子產品與非電子產品以及工業財的情況下異質性產品較多使用出口中介的服務，而在消費財的情況之下則是非異質性產品較多使用出口中介的服務。

Export intermediaries are the firms that specialize in assisting manufacturers in selling their products to foreign markets. Therefore, export intermediaries have always been an important research topic in international trade. The decision on using export intermediary is influenced by the characteristics of both the export destination countries and the products. This paper utilizes customs data and firm tax data from 2007 to 2019 provided by Taiwan's Ministry of Finance. We use exporters in the wholesale trade sector as proxies for export intermediaries. The data are aggregated to the product-country level This allows us to calculate the proportion of a specific product exported to a particular country using export intermediaries, thereby exploring the usage of export intermediaries in Taiwan. We use product characteristics (product differentiation and concentration of wholesalers within the product) and characteristics of the export destinations (GDP, GDP per capita, and distance) as the main explanatory variables and use time fixed effects model for analysis. Furthermore, we introduce country fixed effects or sector fixed effects in the time fixed effects model. Our findings suggest that the share of exports by intermediary is smaller for larger markets while the effects of distance depend on the share of intermediary exports. Additionally, due to Taiwan's unique export patterns, this paper also divides goods into two subsamples based on the Broad Economic Categories: consumer goods and industrial goods (intermediate and capital goods); we also divide products into electronic and non-electronic products. We find that the share of exports by intermediaries is larger for differentiated goods for both electronics and non-electronics products, and for the subsample of industrial goods. For consumer goods, the share of exports by intermediaries is lower for differentiated goods.

[1] Abel‐Koch, J. (2013). Who uses intermediaries in international trade? Evidence from firm‐level survey data. The World Economy, 36(8), 1041-1064.
[2] Ahn, J., Khandelwal, A. K., & Wei, S. J. (2011). The role of intermediaries in facilitating trade. Journal of International Economics, 84(1), 73-85.
[3] Akerman, A. (2018). A theory on the role of wholesalers in international trade based on economies of scope. Canadian Journal of Economics/Revue canadienne d'économique, 51(1), 156-185.
[4] Anderson, J. E., & Van Wincoop, E. (2004). Trade costs. Journal of Economic literature, 42(3), 691-751.
[5] Antras, P., & Costinot, A. (2011). Intermediated trade. The Quarterly Journal of Economics, 126(3), 1319-1374.
[6] Asasongtham, J., & Wichadee, S. (2014). The roles of foreign language in export operations of Thai SMEs. International Journal of Entrepreneurship, 18, 41.
[7] Balabanis, G. (2005). Determinants of export intermediaries' service‐mix configurations. International Marketing Review, 22(4), 436-459.
[8] Bernard, A. B., Eaton, J., Jensen, J. B., & Kortum, S. (2003). Plants and productivity in international trade. American economic review, 93(4), 1268-1290.
[9] Bernard, A. B., Grazzi, M., & Tomasi, C (2015). Intermediaries In International Trade: Direct Versus Indirect Modes Of Export, The Review of Economics and Statistics, October 2015, 97(4): 916–920
[10] Bernard, A. B., Grazzi, M., & Tomasi, C. (2011). Intermediaries in international trade: Direct versus indirect modes of export (No. w17711). National Bureau of Economic Research.
[11] Bernard, A. B., Jensen, J. B., Redding, S. J., & Schott, P. K. (2007). Firms in international trade. Journal of Economic perspectives, 21(3), 105-130.
[12] Castro, L., Li, B. G., Maskus, K. E., & Xie, Y. (2016). Fixed export costs and export behavior. Southern Economic Journal, 83(1), 300-320.
[13] Chen, B., & Li, Z. (2014). An anatomy of intermediaries in China’s export market. China Economic Journal, 7(2), 187-213.
[14] Crozet, M., Lalanne, G., & Poncet, S. (2013). Wholesalers in international trade. European Economic Review, 58, 1-17.
[15] Cyrus, T. L. (2012). Cultural distance and bilateral trade. Global Economy Journal, 12(4), 1850275.
[16] Dasgupta, K., & Mondria, J. (2018). Quality uncertainty and intermediation in international trade. European Economic Review, 104, 68-91.
[17] Feenstra, R. C., & Hanson, G. H. (2004). Intermediaries in entrepot trade: Hong Kong re‐exports of Chinese goods. Journal of Economics & Management Strategy, 13(1), 3-35.
[18] Fung, L., & Schmitt, N. (2024). On the Role of Import Intermediaries in Canada. Canadian Public Policy, 50(1), 87-107.
[19] Gillanders, R., & Whelan, K. (2014). Open for business? Institutions, business environment and economic development. Kyklos, 67(4), 535-558.
[20] Grazzi, M., & Tomasi, C. (2016). Indirect exporters and importers. Review of World Economics, 152, 251-281.
[21] Greene, W. (2013). Export potential for US advanced technology goods to India using a gravity model approach. US International Trade Commission, Working Paper, 3, 1-43.
[22] Hessels, J., & Terjesen, S. (2010). Resource dependency and institutional theory perspectives on direct and indirect export choices. Small business economics, 34, 203-220.
[23] Lohmann, J. (2011). Do language barriers affect trade? Economics Letters, 110(2), 159-162.
[24] Lu, J., Lu, Y., Sun, Y., & Tao, Z. (2017). Intermediaries, firm heterogeneity and exporting behaviour. The World Economy, 40(7), 1381-1404.
[25] Melitz, J. (2008). Language and foreign trade. European Economic Review, 52(4), 667-699.
[26] Melitz, M. J. (2003). The impact of trade on intra‐industry reallocations and aggregate industry productivity. econometrica, 71(6), 1695-1725.
[27] Peng, M. W., & Ilinitch, A. Y. (1998). Export intermediary firms: A note on export development research. Journal of International Business Studies, 29, 609-620.
[28] Peng, M. W., & York, A. S. (2001). Behind intermediary performance in export trade: Transactions, agents, and resources. Journal of international business studies, 32, 327-346.
[29] Rauch, J. E. (1999). Networks versus markets in international trade. Journal of international Economics, 48(1), 7-35.
[30] Trabold, H. (2002). Export intermediation: An empirical test of Peng and Ilinitch. Journal of International Business Studies, 33, 327-344.
[31] 蔣晟與賀燦飛. (2022). 貿易中介對於企業出口產品多樣化的影響. 經濟地理, 42(6), 92-102.