In the 1st design (Model 1), you to only comes with 12 months and you may schooling dummies, age, as well as the many years square of the person, chances percentages to be «single» in place of are «married» are growing over the years and you may tall (See shape dos and you may Dining table 2), which implies your up trend in the strange ratio of becoming unmarried in the place of being married can not be said which have education, many years, and you will decades square simply.