Do these results generalize across time and space? As to the
question of whether the results hold in a different stock
market and are robust with respect to simpler but perfectly
replicable trading rules, the analysis is extended to the United
Kingdom, where the returns are not obtained from audited
profits, but from back testing.
Although customer satisfaction
data comparable to the United States do not exist for many
countries, there is a similar customer satisfaction index in the
United Kingdom: