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Li Shantong, He Jianwu & DuanZhigang, Department of Development Strategy and Regional Economy of DRC Research Report No.151, 2005

Since reform and opening-up, China has achieved an average annual economic growth of 9.4%. It is close to that of Japan and the “four little tigers” in Asia during the periods of their economic taking off [1]. However, maintaining such a high rate of growth in a long period of time is unusual worldwide. Analysts of China’s economic growth generally regard rapid accumulation of capital as the key source of China’s continuously fast economic growth in the past 20 years[2]. Historical data demonstrates that while China’s economy grew rapidly, its investment ratio also remained a high level, putting the issue of “high investment ratio” a hot topic for debate and research. This article tries to explore the roots of the presently high investment ratio and the trend of future investment ratio in China through a worldwide comparison on variation tendency of investment ratio, investment structure and investment ratio.

I. Historical Trends of Investment and Consumption and Their Current Patterns

In general, investment ratio refers to the rate of totalcapital formation, namely a percentage of gross capital formation (including increases in fixed capital and inventory) in GDP, which is calculated with expenditure approach. The ratio of consumption refers to the final ratio of consumption, namely the percentage of final consumption (including household consumption and government consumption) in GDP.

Fig. 1 shows that since 1978, China’s investment ratio basically stayed between 30%-45%. The highest ratio during 1978-2000 was found in 1993, which reached 43.5% (except particularly indicated, all data for 2004 came from China Statistical Summary 2005); the lowest ratio was found in 1982, which reached 32.1%, and the average ratio was 37.3%. In recent years, investment ratio had kept rising, especially in 2004, when it reached a record high of 43.9%. The gross capital formation includes the growth of fixed capital and inventory. In fact, the ratio of fixed-capital formation can best reflect the economic impact of investment. If considering the fixed-capital formation and the variation of inventory separately, we can see that the ratio of inventory basically stayed at a high level before 1990s. However, since 1990s, especially after 1995, the proportion of inventory in GDP continued to fall, and the variation of inventory approached to zero since beginning of this century. The average ratios of fixed-capital formation were 28.97% in 1980s, 33.27% in 1990s (about four percentage points higher than 1980s), and up to 39.69% since beginning of this century. The ratio of fixed-capital formation dropped to its lowest in 1997 along with the “soft landing of the economy”, and rose again with the adoption of active financial policies afterwards. As a result of annual decrease in inventory variation, the ratio of gross capital formation dropped to its bottom in 2000. Because inventory basically varied at a very low speed thereafter, the ratio of gross capital formation rose along with the growth of the ratio of fixed capital formation. The tendency of the ratio of fixed-capital formation in recent years basically synchronized that of gross capital formation (i.e. investment ratio). Therefore, in our analysis below, we sometimes use the ratio of fixed-capital formation to unveil the characteristics of variation of investment.

According to Fig 1, consumption ratio experienced a process of change opposite to that of investment ratio. The level of consumption ratio since the 1990s was lower than before. Average consumption ratio was 65.21% in the 1980s, 59.45% in the 1990s (about six percentage points lower than the 1980s), and down to 57.63% since this century. In term of the two major components of the consumption ratio, both final household consumption and government consumption declined. In particular, the final household consumption ratio dropped from 51.75% in the 1980s to 47.04% in the 1990s, and went down further to 45.03% since beginning of this century.

Fig. 2 shows changes in the levels of household consumption and income since 1978. It reveals that growth of consumption basically synchronized that of income. In the consumption theory, both the permanent income theory and the lifecycle hypothesis regard income as key determinant of consumption. Table 2 shows the growths of GDP, income and consumption in three different periods since 1980s. According to the data, both the per capita average income and the consumption grew slower than GDP, especially for rural residents. Since the 1990s, the growth of per capita net incomeof rural residents were only half of GDP growths. For rural households, comparison of the growths of income and consumption shows that the growths of consumption lacked behind the growth of income in the 1980s, but they grew 50% faster than income in the 1990s, and were basically similar in recent years. For urban households, the consumption in the 1980s and the 1990s grew faster than income, but they dropped to half of those of income in recent years.

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[1]Compared with the 20-year period of economic taking off (1961-1981) of China Hong Kong, Japan, Korea, China Taiwan and Singapore, GDP growth of Mainland China is slightly lower than China Taiwan (10.0%), equivalent to China Hong Kong (9.6%) and Singapore (9.5%), and two percentage points higher than Japan.

[2]According to the findings of our most recent research (2005), annual growth of capital in China during 1978-2003 reached 9.9%, promoting GDP growth by about six percentage points, and contributed 63.2% to economic growth.