Knowledge that Transforms

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We explore a continuous-time agency model with double moral hazard. Using a venture capitalist (VC)–entrepreneur relationship where the VC both supplies costly effort and chooses the optimal timing of the initial public offering (IPO), we show that optimal IPO timing is earlier under double moral hazard than under single moral hazard. Our results also indicate that the manager's compensation tends to be paid earlier under double moral hazard. We derive several comparative static results, notably that IPO timing is earlier when the need for monitoring by the VC is smaller and when the volatility of cash flows is larger.

This article investigates collective denial and willful blindness in groups, organizations, and markets. Agents with anticipatory preferences, linked through an interaction structure, choose how to interpret and recall public signals about future prospects. Wishful thinking (denial of bad news) is shown to be contagious when it is harmful to others, and self-limiting when it is beneficial. Similarly, with Kreps–Porteus preferences, willful blindness (information avoidance) spreads when it increases the risks borne by others. This general mechanism can generate multiple social cognitions of reality, and in hierarchies it implies that realism and delusion will trickle down from the leaders. The welfare analysis differentiates group morale from groupthink and identifies a fundamental tension in organizations' attitudes towards dissent. Contagious exuberance can also seize asset markets, generating investment frenzies and crashes.

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This paper investigates how precisely short-term, job-search oriented training programs as opposed to long-term, human capital intensive training programs work. We evaluate and compare their eects on time until job entry, stability of employment, and earnings. Further, we examine the heterogeneity of treatment eects according to the timing of training during unemployment as well as across dierent subgroups of participants. We nd that participating in short-term training reduces the remaining time in unemployment and moderately increases job stability. Long-term training programs initially prolong the remaining time in unemployment, but once the scheduled program end is reached participants exit to employment at a much faster rate than without training. In addition, they benet from substantially more stable employment spells and higher earnings. Overall, long-term training programs are well eective in supporting the occupational advancement of very heterogeneous groups of participants, including those with generally weak labor market prospects. However, from a scal perspective only the low-cost short-term training schemes are cost ecient in the short run.

In the 2001 U.S. Survey of Consumer Finances (SCF), 27% of households report simultaneously revolving significant credit card debt and holding sizeable amounts of low-return liquid assets; this is known as the \\credit card debt puzzle". In this paper, I quantitatively evaluate the role of liquidity demand in accounting for this puzzle: households that accumulate credit card debt may not pay it off using their money in the bank, because they anticipate needing that money in situations where credit cards cannot be used. I characterize the puzzle in survey data, and calibrate a dynamic stochastic heterogeneous-agent model of household portfolio choice, where consumer credit and liquidity coexist as means of consumption and saving, where households consume a cash good and a credit good, and where cash consumption is subject to uncertainty. The model accounts for between 44% and 56% of the households in the data who hold consumer debt and liquidity simultaneously, and for 100% of the liquidity held by a median such household. Under reasonable calibration alternatives, the model can capture the entire puzzle group size as well. One-half of money demand in the model is precautionary.

How do income shocks affect armed conflict? Theory suggests two opposite effects. If labour is used to appropriate resources violently, higher wages may lower conflict by reducing labour supplied to appropriation. This is the opportunity cost effect. Alternatively, a rise in contestable income may increase violence by raising gains from appropriation. This is the rapacity effect. Our article exploits exogenous price shocks in international commodity markets and a rich dataset on civil war in Colombia to assess how different income shocks affect conflict. We examine changes in the price of agricultural goods (which are labour intensive) as well as natural resources (which are not). We focus on Colombia's two largest exports, coffee and oil. We find that a sharp fall in coffee prices during the 1990s lowered wages and increased violence differentially in municipalities cultivating more coffee. This is consistent with the coffee shock inducing an opportunity cost effect. In contrast, a rise in oil prices increased both municipal revenue and violence differentially in the oil region. This is consistent with the oil shock inducing a rapacity effect. We also show that this pattern holds in six other agricultural and natural resource sectors, providing evidence that price shocks affect conflict in different directions depending on the type of the commodity.

Principal--agent models in which the agent has access to private information before a contract is signed are a cornerstone of contract theory. We have conducted an experiment with 720 participants to explore whether the theoretical insights are reflected by the behaviour of subjects in the laboratory and to what extent deviations from standard theory can be explained by social preferences. Investigating settings with both exogenous and endogenous information structures, we find that agency theory is indeed useful to qualitatively predict how variations in the degree of uncertainty affect subjects' behaviour. Regarding the quantitative deviations from standard predictions, our analysis based on several control treatments and quantal response estimations shows that agents' behaviour can be explained by social preferences that are less pronounced than in conventional ultimatum games. Principals' own social preferences are not an important determinant of their behaviour. However, when the principals make contract offers, they anticipate that social preferences affect agents' behaviour.