[5] He has taught in Thailand, Switzerland, Sweden, New Zealand, Australia, South Africa, Argentina, Japan, and other countries.
[5] Armstrong also has published several papers dealing with public policy issues: ranging from the effectiveness of government mandated disclaimers, to the moral hazards of executive compensation.
[11][12] Regarding government mandated disclaimers, Armstrong argues that they can be ineffective- or even harmful- by encouraging negative behavior,[11] perhaps by reducing the buyer's sense of personal responsibility.
Armstrong further asserts that the free market will ensure that the appropriate information about a given product is made public.
Additionally, the research argues that high pay incentivizes unethical behavior for executives, as they have little motivation to promote a firm's interest long-term.
[13] In an article published in Energy & Environment, Armstrong posited that the climate scientists have ignored the "scientific literature on forecasting principles", for instance by not referring to his own website forecastingprinciples.com.
[15] A group of biologists, whose polar bear research Armstrong disagreed with on that basis, have called Armstrong's applications of business forecasting methods to scientific projections "too ambiguous and subjective to be used as a reliable basis for auditing scientific investigations.
"[17] Armstrong extended a "Global Warming Challenge" to Al Gore in June 2007,[18] in the style of the Simon–Ehrlich wager.