The price index for dwelling rents in Finland have been measured from data that is collected in connection with the Labour Force Survey (LFS). The construction of index series is based on the base strategy with log-Laspeyres as the index number formula. Some problems have emerged: First, the...

Differences between chain and base methods (or strategies) are analyzed. This is a preliminary paper that concentrates on numerical results and new ideas. Omitted proofs will appear in later papers. As in title, we use the term circular or chain error. We do not use milder terms as drift or...