A prominent example of a stylized fact is: "Education significantly raises lifetime income." Another stylized fact in economics is: "In advanced economies, real GDP growth fluctuates in a recurrent but irregular fashion, with an average cycle length of five to eight years".
As noted above, scrutiny to detail will often produce counterexamples. In the case given above, holding a PhD may lower lifetime income, because of the years of lost earnings it implies and because many PhD holders enter academics instead of higher-paid fields. Nonetheless, broadly speaking, people with more education tend to earn more, so the above example is true in the sense of a stylized fact.
Nicholas Kaldor summarized the statistical properties of long-term economic growth in an influential 1957 paper. He pointed out the following 'remarkable historical constancies revealed by recent empirical investigations':
Kaldor did not claim that any of these quantities would be constant at all times; on the contrary, growth rates and income shares fluctuate strongly over the business cycle. Instead, his claim was that these quantities tend to be constant when averaging the data over long periods of time. His broad generalizations, which were initially derived from U.S. and U.K. data, but were later found to be true for many other countries as well, came to be known as 'stylized facts'.