5. Results and discussion
The estimates of the marginal effects obtained for the both birth cohorts considered 1952–1968 and 1969–1986 are discussed in this section. First of all, the empirical strategy of splitting the original sample between two groups have been positively verified by means of the Wald test (Greene, 2012). Secondly, the main findings obtained through the analysis of the estimations (Tables 5 and 6) confirm the first hypothesis proposed since social mobility depends on personal and labour characteristics.