The Dual Spatial Autoregressive Probit Model with an Application to the 2001 Congressional Farm Bill

New additive composition, in liquid or powder form, for thin slabs, plasters, concretes, prefabricated elements and refrectory elements, with insulating and impermeabilizing properties and with antishrink characteristics, comprising a bonding agent and an additive comprising a mixture of carbonates containing 59-75% CaCO3, 25-37% Si(CO3)2, 0-2% Al2(CO3)3, 0-1% MgCO3 and 0-1% Fe2(CO3)3.