In a previous article published in this Review (Sacchetti 1999) I high-lighted four trends in the US economy which I believed to be not sustainable. It was stated that a reversal was likely, but that the time of the turnaround was not predictable. My opinion remains unchanged. In what follows I shall rapidly review three of the four trends, and shall give a factual account of what happened during the last 4 to 5 years. The fourth trend, i.e., the developments in the country’s exter-nal accounts, will be discussed in more details because of the magni-tude of the problem, of the difficulties to solve it due to its complexi-ties and because of the possible implications, for the US and the world economy, if a solution is not found (and even if ...