We carried out different kind of comparisons: between the old version of SCI surveyand the electronic one, between paper and web mode for PMI survey, differences due to different enterprises characteristics in SCI and PMI survey. We applied some statistical test (Kruskal-Wallis, Kolmogorov-Smirnov, Fligner Policello), some graphical analyses and some regression models.An increasing efficiency and quality is particularly evident for electronic questionnaire utilisation within the associated literature but sometimes the quality results of different web surveys are not comparable. The results coming from the introduction of electronic questionnaire in two different surveys, but concerning the same topic and with the same timeliness, confirm a increasing in survey quality. In this paper we analyse the impact on quality of electronic response mode for business surveys, the characteristics of enterprises depending on the different response mode, the electronic survey management difficulty.

The business surveys in Italy are experimenting a gradual shift towards equestionnaires based data collection. All information requested by the demand of official statistic in order to match the SBS Regulation requirements are produced on the basis of two surveys: a detailed survey on economic and financial accounts covering all enterprises operating in Italy with at least 100 persons employed (SCI) and a sample survey on the enterprises with 1-99 persons employed (PMI). Meanwhile the survey on large enterprises has been using e-questionnaire since 2003 edition the sample survey has launched the first electronic data collection in 2007 edition.