We refer to input-output analysis to investigate the global trade system and to assess the impact of the pharmaceutical industry on the world economy.
Our central findings can be summarized as follows:
- Overall, the global input-output system has become more integrated over time;
- The pharmaceutical industry has become more globalized over time;
- The impact of the pharmaceutical industry, measured by the Leontief multipliers, is persistently high and stable in EU15, whereas it has been slightly decreasing in the US;
- China has emerged as a leader integrating the Asia-Oceania trade community.
1. Integration of the Global Input-Output System
The main data we use for the multiregional input-output (MRIO) system is from the World Input-Output Database (WIOD). The original WIOD has aggregated pharmaceuticals into chemicals and chemical products. For this reason, we extracted information from other resources and split the chemical industry into pharma versus non-pharma. Figure 2 shows our disaggregation strategy. Another recently available MRIO data set, EORA, is used, since it has detailed information within the chemical industry for a subset of countries.
Based on the disaggregated WIOD data, Figure 2 and 3 show the global input-output system in 1995 and 2011, respectively. Notice that only the important (beyond certain flow value threshold) links are shown. As expected, for both 1995 and 2011, each cluster is corresponding to an individual economy. Because the most intense industrial linkages are still within the domestic economy. However, it is straightforward to see the system has become more integrated in terms of the density of the industrial linkages both within and between economies.
2. China’s Rise in the Asia-Oceania Community
The dynamics of the Asia-Oceania community can be roughly divided into three stages, namely, its presence with Japan’s leadership during 1995-2001, its disappearance and integration with the America community during 2002-2004, and finally its reemergence with China’s leadership during 2005-2011. The pattern is shown in Figure 1, where three years, 1995, 2002, and 2011, are selected to represent the three stages respectively. The first row shows the community maps in the three years. The America community is colored yellow, the Europe community is colored red, and the Asia-Oceania community is colored blue. Notice that in 2002 the blue community was by and large merged with the yellow community. The second row shows the community core detection results for the three years. The redder the more important the country is in reserving its community. Equivalently, the yellower the less important the country is in reserving its community. This can be used to identify the leaders in the communities (see the shift from Japan to China as a leader moving from 1995 to 2011). Finally, the third row provides a topological view of the community structure at different points in time. Again, Japan was central in the Asia-Oceania community in 1995, and it was replaced by China in 2011.
3. Globalization of the Pharmaceutical Industry
Based on the disaggregated WIOD with pharmaceutical information, we provide an estimate of the role of the pharmaceutical industry in the global economy.
Figure 5 shows the destinations of the pharmaceutical products from USA and EU15, respectively.
Three years, 1995, 2003, and 2011, are selected to capture the time dynamics. The output is first divided into four subsets, i.e., intermediate consumption, household final consumption, public final consumption (including non-profit organization final consumption and government expenditure final consumption), and other final demand (including capital formation and changes in inventories). Within each group, the top two destinations are identified.
For instance, USA in 1995 had 47% of its pharmaceutical output going to the intermediate consumption, within which the top two destinations were USA itself and “the rest of the world” (economies not included in WIOD).
The shares of the four groups are relatively stable in USA and EU15. The globalization of the pharmaceutical industry is evidenced by the fact that for both USA and EU15, the share of foreign destinations has been increasing over time.
4. The Economic Impact of Pharmaceuticals
Because of the interrelationships among industries, an increase of demand for a single industry will have repercussion effects on other interrelated domestic and foreign industries. The Leontief multipliers give a comprehensive measurement of the repercussion effects and hence can be used to evaluate the impact of any given industry.
Figure 6 reports the Leontief multipliers for the pharmaceutical industry, the health work industry (including human health activities, veterinary activities, and other social work activities), and the average value of all 36 industries for China, USA, and EU15 in 2011. The main result here is that China has more impact of its industries in all the categories examined here than USA and EU15.
Figures 7-10 further divides the domestic impact of the pharmaceutical industry on different industries within the three economies. Compared with China and EU15, USA has its pharmaceutical impact more concentrated in the industry itself over time. Also, service industries such as “other business activities” matter more in the developed economies, USA and EU15, than in China.
The Leontief multipliers can be aggregated in three ways, namely, total effects, domestic effects, and foreign effects. For example, total effects of industry A in country B is to measure the impact of a 1-dollar increase in the final demand of industry A in country B on the world economy, whether the impact is domestic or foreign. In contrast, domestic effects and foreign effects of industry A in country B only measure the impact of a 1-dollar increase in the final demand of industry A in country B on the domestic economy and on the rest of the world respectively. In other words, total effects equal the sum of domestic effects and foreign effects.
Figure 11 reports the three effects of the pharmaceutical industry and the health work industry (including human health activities, veterinary activities, and other social work activities) in China, USA, and EU15, respectively. Over time, the general trend for both pharma and health work is increasing in China. In USA, the general trend for health work is stable while that for pharma is decreasing. In EU15, the general trend for both pharma and health work is relatively stable, with a slight increase in recent years.
Scritto da: Zhen Zu