This thesis studied the following three essays to analyze the effect of the globalization spreading worldwide.Using the Asian International Input-Output Table (1990, 1995, and 2000), the first essay explores regional production networks and offshoring of material and service inputs in East Asia. In doing so, offshoring is measured directly from the Table, which has not been used in previous literature regarding this issue. It turns out that East Asian countries source significant shares of inputs within East Asia. In addition to material offshoring, service offshoring in East Asia has become increasingly common in the era of globalization. We also evaluate the effects of this fast growing offshoring on productivity. Our econometric results demonstrate that offshoring exerts a significant and positive impact on total output in East Asia. Service offshoring, in particular, performs a more significant role than material offshoring. The second essay investigates the effects of foreign direct investment (FDI) on the host country’s economic performance, namely, its total factor productivity (TFP). Such effects are often referred to as FDI externalities or spillover effects. In addition, the essay examines whether such spillover effects depend on the home country’s income level. Our empirical findings indicate that FDI flows have positive effects on less developed countries (South countries), and that the effect of FDI flows from the developed countries (North countries) is stronger than that from less developed countries. That is, these results confirm the so-called North-South effects but provide no evidence of South-South effects. Furthermore, another channel of spillover effects is imports, which have significant effects on TFP. The third essay unlike the previous essays, analyzes the labor market destination of South Korea. In other words, this study examines the effects of several factors indicating economic openness—imported intermediate goods, total imports, IFDI (inward foreign direct investment), and foreign ownership—on regular jobs, irregular jobs, and the ratio of regular to irregular positions. Findings revealed that imported intermediate inputs and IFDI did not affect regular or irregular job figures. However, an increase in total imports led to a decline in irregular jobs without impacting full-time, regular ones, and thus led to a decrease in the ratio of irregular to regular jobs. On the other hand, a change to foreign ownership had the opposite effect, namely a decline in regular jobs and an increase in irregular ones, and, thus, an increase in the ratio of irregular to regular jobs. Overall the results showed that a rise in imports results in depressed overall employment, particularly for irregular jobs, while more IFDI results in more irregular jobs replacing regular ones, effectively exacerbating job insecurity. The implication of this analysis is that greater economic openness may have an overall negative impact on the South Korean labor market.