Federico Chabod, one of Italy's foremost historians, was a student of the great Gaetano Salvemini (http://it.wikipedia.org/wiki/Gaetano_Salvemini)
Though an active anti-fascist, he was allowed to teach in Italy during the whole of the fascist period (http://it.wikipedia.org/wiki/Federico_Chabod). This, in fact, is characteristic. Though Mussolini was a dictator, and the fascist milizia (MVSN) could certainly be brutal -- there is no comparison between the dictatorship in Italy and that in Germany. Where Hitler killed millions -- certainly many tens of thousands of his political opponents --, Mussolini killed scores or hundreds. He simply bullied the rest. (Salvemini, for example, was driven into exile in 1925.) Typical of his is that the Enciclopedia Italiana (http://en.wikipedia.org/wiki/Enciclopedia_Italiana), edited by Giovanni Gentile (http://www.goodreads.com/book/show/2206409.Giovanni_Gentile), used many anti-fascists, notably the great ancient historian, Gaetano de Sanctis (http://it.wikipedia.org/wiki/Gaetano_De_Sanctis). And of course, there was Croce: http://it.wikipedia.org/wiki/La_Critica
Most readers will not find this book to be of much value. It consists of some brief lectures prepared for a French audience and published after Chabod's death in 1960. The translation is not very good. But for those familiar with the topic, there are some excellent insights, and the book is worth a quick read.
I would focus on pages 47-84, and not bother with the rest. At 71ff., there is a fine, brief discussion of Corporativism.