Irving Fisher — American Economist born on February 27, 1867, died on April 29, 1947

Irving Fisher was an American economist, statistician, inventor, and Progressive social campaigner. He was one of the earliest American neoclassical economists, though his later work on debt deflation has been embraced by the Post-Keynesian school.Joseph Schumpeter described him as "the greatest economist the United States has ever produced", an assessment later repeated by James Tobin and Milton Friedman... (wikipedia)

Stock prices have reached what looks like a permanently high plateau.
The rate of interest acts as a link between income-value and capital-value.