This post is about the reasons why opportunities for people
to live long and healthy lives are much greater in some countries than in
others. In the preceding post the prospect of a long and healthy life was
identified as one of five basic goods of a flourishing human.
So, which are the countries in which an individual chosen at
random would be likely to have the best prospects of a long and healthy life?
The OECD’s Better Life Index gives top ratings on health to Canada, New
Zealand, Australia, Israel and Ireland. The health indicator used in that index
may not be reliable, however, because it incorporates self-reported health
along with life expectancy at birth to take account of the quality of life as
well as its length. Self-reported health seems to be unduly influenced by
cultural factors. For example, while life expectancy in Japan is among the
highest in the world (more than 2 years greater than in Canada) less than 40%
of people in Japan rate their health as good or very good (the comparable
figure for Canada is 88%).
Objective evidence published in The Lancet articles
on Global Burden of Disease indicate that the difference between life
expectancy and healthy life expectancy (the number of years people can expect
to live in good health) is about the same in Japan and Canada (13 years for
females and 10 years for males).
The Lancet study, which covers 195 countries and
territories, indicates that healthy life expectancy (HALE) is highest in
Singapore and Japan, but also relatively high in other high income countries.
HALE is strongly correlated with life expectancy (LE). The difference between
HALE and LE rises somewhat as LE rises: on average from 6.4 years for a country
with LE of 50 years, to 10.8 years for one with an LE of 80 years. The
difference is typically about 2 years greater for females than males, but LE
for females is about 5 years greater than for males in middle and higher income
countries.
The accompanying graph shows that substantial increases in
HALE have occurred in many countries since 1990. The increases have generally
been most pronounced in countries with relatively low life expectancy.
There seems to be little support for concerns that
additional years of life are frequently not worth living. For countries with
low LE in 1990, average increases in LE of 12 years were associated with
increases in HALE of 10.5 years. For countries that already had high life
expectancy in 1990, average increases in LE of 5 years were associated with
increases in HALE of 3.7 years. It seems likely that many individuals would consider
an additional year of life to be preferable to the alternative, even if
accompanied by some ill-health.
Research seeking to explain differences in longevity among
countries suggests that health care spending, higher income and education have
beneficial impacts. An OECD study of 35 countries (mostly high-income) found
that health expenditure made the greatest contribution to increased longevity (42
months) over the period 1990 to 2010, followed by education (15 months) income
growth (13 months) and reduced smoking (5 months). The study found the impact
of increased health spending to vary between countries, with relatively small
gains in longevity experienced in the U.S. despite large increases in health
care spending.
War and violent crime have a major impact on life expectancy
in some parts of the world. For example, life expectancy among men who live in
the north of Mexico apparently declined by about 3 years in the period 2005 to 2010
as a result of an increase in the homicide rate associated with drug wars.
Some of the important drivers of increased longevity have a
common cause: health care spending has tended to account for a higher share of
GDP as per capita GDP has risen. Econometric studies have suggested that this
increased spending may be driven largely by demographic and technological
factors, but income growth makes it possible.
The more fundamental determinants of opportunities for a
long and happy lives are the factors contributing to the economic development
that has led to high average income levels. There are virtuous circles involved
in this process. As previously discussed on this blog, a plausible story of
economic development also needs to take account of virtuous circles involved in
interactions between culture and economic freedom. Where culture and economic
freedom support markets, people have added incentives to gain reputations as
being worthy of trust others in order to obtain the benefits of mutually
beneficial exchanges. As people become more trustworthy and trusting, and more
respectful of the rights others, they could be expected to support greater
economic freedom. Economic freedom, and a culture supporting innovation, result
in further economic development and economic development promotes a culture
supporting greater economic and personal freedom. As part of this process, improvements
in population health could be expected to contribute to higher labour productivity
and further enhance income levels.
The economic development story outlined above implies that
we should expect healthy life expectancy (HALE) to be higher, on average, in
countries with higher levels of economic and personal freedom. In order to test
that, HALE data for 155 countries have been matched with data from the Fraser
Institute’s Human Freedom Index. The chart below shows that average HALE is about 10
years greater for the countries in the fourth quartile, with the highest
freedom levels, than for countries in the first quartile, with the lowest
freedom levels.
Conclusions
The countries in which a person chosen at random seems
likely to have the best prospects of having a long and healthy life are
characterised by high average income levels. Estimates of healthy life
expectancy (HALE) published in The Lancet’s global burden of disease
project are highest in Singapore and Japan. Since 1990, there have been
substantial increases in HALE in most countries.
Health spending, income growth and education have
contributed substantially to increased longevity. The more fundamental
determinants of opportunities for people to have long and healthy lives are the
cultural and institutional factors that have contributed to economic
development. Evidence that high HALE is associated with high levels of human
freedom supports an economic development story taking account of virtuous
circles involving market freedom, cultures supporting freedom and health
improvements.