We propose a novel, multilaterally consistent productivity approach-based indicator to assess the international price … attention has been paid to an appropriate selection of price and productivity data in levels as opposed to indices, and to the …

and their average quality affects the productivity of researchers in physics, chemistry, and mathematics. The usual … affect a researcher's productivity. Among co-authors, however, there is strong and significant evidence that peer quality … affects a researcher's productivity. Loosing a co-author of average quality reduces the productivity of an average scientist …