YOU are familiar with those huge ant-heaps that one finds occasionally in the woods: myriads of tiny particles collected and put together with patience and perseverance by a legion of methodic small creatures. Whenever I think of the statistical aspects of the gross product in a detached fashion this image comes to my mind, and the analogy brings out the difficulties which I face in this talk: While the complete ant-heap is truly imposing, it is not easy to say anything of a general nature about the individual particles. Nor do the techniques employed by the builders appear to lend themselves to significant summarization. However, to talk in detail about the particles and the work by which they are put together would not only be an endless affair; it would also be endlessly boring. I shall deal as well as I can with these difficulties, and hope that I shall be able to further your understanding of gross product statistics.