We use weekly data from 79 Russian regions to measure the impact of economic shocks and proximity to war in Ukraine on social capital in Russian regions. We proxy social capital by the relative intensity of internet searches for the most salient dimensions of pro-social behavior such as “donate blood”, “charity”, “adopt a child” etc. This measure of social capital is correlated with a survey-based measure of generalized social trust. Our search-based measure of social capital responds negatively to the spikes of inflation and positively to the intensity of the conflict in Ukraine (controlling for region and week fixed effects).

The paper shows how time considerations, especially those concerning contract duration, affect incomplete contract theory. Time is not only a dimension along which the relationship unfolds, but also a continuous verifiable variable that can be included in contracts. We consider a bilateral trade setting where contracting, investment, trade, and renegotiation take place in continuous time. We show that efficient investment can be induced either through a sequence of constantly renegotiated fixed-term contracts; or through a renegotiation-proof “evergreen” contract—a perpetual contract that allows unilateral termination with advance notice. We provide a detailed analysis of properties of optimal contracts.