These changes include the calibration of expansion factors, the method used to correct for non-responses to the income questions, and the construction of income aggregates for items that are not of monthly recurrence. The various changes, such as enlargement of the domains studied, the change in informant type and the increase in the number of questions and alterations in their wording, made it necessary to splice the employment, income and poverty figures from the two sources, a task which was carried out by the Mission for the splicing of employment, poverty and inequality series (MESEP). The methodological changes introduced mean that the findings of the new ENAHO 2010 are not directly comparable with those published on the basis of the previous survey. The country expects to produce a spliced historical series soon.