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…showed last 75 words of 650 total…marriages by seeking additional personal challenges. BIAS More women responded than men. Also, if couples would have been interviewed so a clearer picture between spouses response could have been analyzed (couple-level data). Also gender role attitudes of spouses were not included. The role of social class was not taken into consideration. Another item is that the study began 19 years ago, concluding 11 years ago. This country has experienced a bull market and a low unemployment rate.