32
So far,
I have only referred to
indirect
evidence – “smoking guns” – of
inefficiencies in the Chinese growth path. In principle, these inefficiencies should
also be reflected in estimates of total factor productivity (TFP) growth in the context
of aggregate production functions – although calculations of this variable are
probably even more hazardous in China than in developed countries.
54
Most such
calculations indicate yearly rates of TFP growth in the interval 3-4 percent during
the reform period. However, we may want to confine the calculation to
contributions to output growth through better technology and organization in
individual firms, sometimes called “multifactor productivity” (MFP) growth. In this
case, it is reasonable to exclude both reallocation gains across sectors (basically
shifts of labor from agriculture to other sectors) and improvement in
human capital
through education and training. Each of these two factors is often estimated to have
contributed nearly one percentage point (per year) to the output growth rate in China
during the reform period.
55
When these factors are excluded from calculations of
TFP growth, we obtain figures (of MFP growth) approximately in the interval of 1.5
to 2.5 percent per year during the reform period.
56
Compared with the pre-reform decades, for which MFP growth seems to have been
close to zero (OECD, 2005a), these figures appear to be fairly good. However, the
picture requires modification in important respects. First, part of MFP growth
during the reform period reflects once-and-for-all efficiency improvements in
connection with the agricultural reforms in the period 1979-1984, as well as
temporary productivity spurts in other sectors in the mid-1990s
when prices were
deregulated. Second, it would seem that much of the improvement in technology
and organization in the manufacture sector, so far, is the result of the entry and
expansion of non-mainland firms rather than improvements in a broad spectrum of
domestic firms (Tseng and Zebregs, 2002; OECD, 2002, pp. 195-230).
57
Some
54
Indeed, Holz (2005b, section 4a) argues that there is no stable aggregate production function for China
for the reform period.
55
For estimates of reallocation gains arising from the contraction of agriculture see, for instance,
Borensztein and Ostry (1996); Woo (1998); and OECD (2005a, Table 1:4). Kuijs and Wang (2006b)
conclude that these reallocation gains have gradually fallen in recent years; they argue that the
contribution was 0.8 percentage points per year in the period 1993-2003.
56
For surveys of studies of TFP and/or
MFP growth, see, for instance, Heytens and Zebregs (2003);
Blanchard and Giavazzi (2005); OECD (2005a); and Wu (2006).
57
Whalley and Xin (2006) estimate that such firms contributed no less than 40 percent of China’s GDP
growth in 2003 and 2004.
33
studies also suggest that the rate of TFP and MFP growth has gone down during the
last decade, although it is impossible to know if this new trend will continue and, if
so, how strong it will be.
58
While we would expect falling returns on real
investment, other factors are likely to have positive effects on GDP growth, such as
the faster restructuring and privatization of the SOEs, the gradually higher R&D
spending (starting from a low level), increased competition as a result of joining the
WTO, and better economic integration of various geographical areas
within China
itself.
On the basis of existing evidence, it is reasonable to conclude that (except mainly
for the sector of foreign firms) economic growth in China has largely been
resource
extensive
in the sense of heavily relying on capital accumulation, inputs of raw
materials and energy, and the depletion of environmental resources.
Naturally, both the public discussion and the scholarly literature have emphasized the
huge regional differences in per capita income growth – with the eastern (coastal)
provinces as the leaders, and the mountainous provinces in the west, along with the
“rustbelt” areas
in the north as the laggards; see, for instance, Démurger et al. (2002).
Official statistics suggest that while GDP has grown by about 11.5 percent per year during
the reform period in the most successful provinces (Fujian, Guangdong, Jiangsu and
Zhejiang), the growth rate has been about half of that in the least successful province
(Quinghai); see, for instance, Wei and Liu (2004).
However, such extreme comparisons
give an exaggerated picture of the
overall
dispersion of the distribution
of growth rates
across provinces. The standard deviation of the per capita growth rate across provinces
during the period 1980-2002 seems to have been 1.5 percentage point, which, however, is
enough to generate large differences in levels of per capita income across provinces.
59
The
level
of per capita GDP is currently reported to be about seven times higher in the
most developed than in the least developed province, even if we exclude the very poorest
province (Guizhou).
58
For instance, OECD (2005a, Table 1.4) reports a fall in multifactor productivity growth from 3.4
percent per year during 1993-1998 to 1.3 percent per year during 1998-2003. Angang and Zheng (2004)
report a fall from 3.7 percent during 1991-95 to 0.6 percent during 1996-2001.
59
According to Blanchard and Giavazzi (2005, p. 6), the standard deviation of the
level
of income per capita
across provinces increased by 72 percent between 1998 and 2003.
34
Indeed, the regional differences among China’s provinces (and large cities) are so large
that China looks like a continent with a mixture of emerging industrial countries and some
of the poorest “countries” in the world.
It is also well known that
per capita income differs
drastically between urban and rural areas within provinces. For instance, official statistics
suggest that the ratio of average income in urban areas is about three times (3.3) as high as
in rural areas. However, this is a highly uncertain figure because it may not fully reflect
differences in costs of living in rural and urban areas – a measurement defect that is usual
in other countries as well. Although average income and consumption have increased
rapidly in nearly all parts of the country during the reform period (Chow, 2006a;
Ravallion and Chen, 2006), these geographical differences are an important background
for widespread dissatisfaction with the
social
situation in the country –
an issue to which I
now turn.