Not house prices rising with banks running after them with bigger mortgages
This is a technical point to do with Correlation and
Causation which slick tricksters try to use to defend the banks’ immoral and
incontinent behaviour. So this is a bit longer than previous Facts.
has marched steadily upward with house prices,
while other forms of bank credit have tailed off,
as shown in this graph.
Does that prove higher prices were caused by looser lending? Not necessarily!
Here’s what J R-C says
“One concern with the view that increases in mortgage debt
drive up house prices
is that causation may run the other way: rising house prices
(caused by some other
factor, for example, inelastic supply or rising incomes)
lead to greater demand for
mortgage credit. However, there are reasons to be skeptical
of this view.
First, a number of recent empirical studies using
careful statistical identification
strategies, such as using financial deregulation as an
instrument exogeneous
to demand, suggest that house price rises are more likely to
be a response to
credit supply expansion rather than a cause. For example, in
one US study (q.v.)
the authors were able
to isolate the extent to which credit liberalisation was
exogeneous to demand in impacting mortgage credit
expansion and associated house price increases. This study
found that between
1994 and 2005, deregulation explained between one half and
two-thirds of the
observed increase in mortgage loans, and between one third
and one half of the
increase in house prices.
Second, other studies have found credit constraints
to be the most important factor in explaining cross-country differences
in house prices, which helps to explain different house price responses
to the same shifts in interest rates.
Third, the UK was not alone in seeing rapid expansions in
mortgage credit
correlated with rising house prices. For example, one study
found that across 16
high-income economies, on average, mortgage credit rose from
40% of GDP in
the mid-1990s to 70% by 2007, with house prices doubling
over the same period
Given significant differences in other potential explanatory variables in such
a large sample of countries, such as the elasticity of housing supply or
changes in income, expansion in mortgage debt, which occurred nearly
everywhere in the 1990s, is the most convincing intuitive explanation.
Indeed, recent cross-country empirical research shows
liberalising mortgage credit has actually led to
lower levels of home ownership
as affordability has worsened across many advanced economies.
Furthermore, rising mortgage debt and credit
liberalisation are not associated with increased
construction of new homes, as is
often claimed.”