Abstract
Tournaments represent an increasingly important component of organizational compensation systems. While prior research focused on fixed-prize tournaments where the prize to be awarded is set in advance, we introduce ‘output-dependent prizes’ where the tournament prize is endogenously determined by agents’ output—it is high when the output is high and low when the output is low. We show that tournaments with output-dependent prizes outperform fixed-prize tournaments and piece rates. A multi-agent experiment supports the theoretical result.
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Notes
Firm performance is simply the sum of the output levels of the two agents (\(x_{i}+\varepsilon _{i}+x_{j}+\varepsilon _{j})\).
Some tournament models (e.g., Lazear and Rosen 1981) rely on normally distributed noise for the sake of mathematical convenience. While this violation of economic nonnegativity constraints is easily sustainable in theory, it is not possible to implement a true (non-truncated) normal distribution in an experiment.
This value of 20 is not to be confused with the equilibrium effort of 20 which agents should invest according to our parametrization. While the use of the same value may be slightly confusing for the reader, is was not confusing for the participants, as they were not explicitly told that the equilibrium effort is 20.
Production\(\,=\,x_{i} + \varepsilon _{i}\); joint revenue \(= 20(x_{1} + \varepsilon _{1} + x_{2} + \varepsilon _{2})\); cost \(= (\omega + \beta )(x_{1} + \varepsilon _{1} + x_{2} + \varepsilon _{2})+ \alpha \); profit \(= u_{p}\).
This pattern suggests reciprocal behavior on the side of the agents. Since agents are paid less for the same effort under contracts that maximize the expected profit of the principal, they may be negatively reciprocating these contract choices by investing less effort (than the equilibrium level). Similarly, agents may be positively reciprocating choices of contracts that yield less profit to the principal, and higher wages to themselves, by investing more effort.
For the purpose of this and the following analyses we use the level of each contract component rather than its absolute value. For example, while the possible values of the \(\alpha \) component are 0, 200, 400, 600, and 800, the variable included in the analyses has corresponding values of 0, 1, 2, 3, and 4. The same holds for the \(\beta \) and \(\omega \) components.
Each of these Tobit regressions uses only one explanatory variable (the principal’s equilibrium profit, the level of the \(\alpha \) component, the level of the \(\beta \) component, or the level of the \(\omega \) component). It is not possible to include all of these as explanatory variables in the same regression model because they are not independent from one another; the level of each contract component can be determined by the other two, and the principals’ equilibrium profit can also be determined by the levels of any pair of components.
The small value of the coefficient is somewhat misleading and results from the difference in scales between the equilibrium profits (0–960) and the effort level interval from which agents could choose (0–30). Considering the full ranges of possible payoffs and effort levels, an increase of 10.4 % (of the full range) in payoffs is accompanied by an increase of 2.5 % in effort.
Figure 6 in the “Appendix” visualizes the dependency of agents’ effort on the level of \(\alpha \), \(\beta \), and \(\omega \), and the equilibrium profit of the principal, depending on contract choice.
The lack of noticeable dynamics in principals’ contract choices may be partly due to the fact that in many cases principals already started out by relying heavily on output-dependent prize incentives (\(\beta \)) in the first phase and therefore had little room for improvement in subsequent phases.
See Güth et al. (2015) on the potential interaction effects between the choice of compensation and inter-firm competition.
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Ori Weisel: Acknowledges support from the European Research Council (ERC-AdG 295707 COOPERATION).
Appendix
Appendix
1.1 Derivation
In this section we derive the equilibrium effort level of the agents, starting with their expected payoff, as given in Eq. 3:
with
Expressing the definite integrals in the definition of the function \(h(x_i,x_j,\varepsilon _j)\) we get
Substituting \(h(x_i,x_j,\varepsilon _j)\) in Eq. (3) and differentiating the expected profit with respect to \(x_i\) we get
and the best reply of i to j, assuming a symmetric equilibrium, is
When \(\frac{\beta }{\varepsilon \gamma -\beta }\ge 1\) (rewritten as \(\beta \ge \frac{\gamma \varepsilon }{2}\)) i’s best reply to any \(x_j\) is \(x_i>x_j\). From the symmetry between i and j it follows that when \(\beta \ge \frac{\gamma \varepsilon }{2}\) both agents invest the maximal effort. When \(\beta < \frac{\gamma \varepsilon }{2}\), and again considering the symmetry between i and j, the unique equilibrium effort \(\hat{x}\) (in the sense of mutually best replies) must satisfy the first order condition
resulting in
1.2 Instructions
1.2.1 The situation
This experiment consists of multiple rounds. Before the first round, we will randomly assign you to one of two possible roles, namely the A-role and the P-role, which you will keep throughout the entire experiment. There will be groups of one P-participant and six A-participants that stay together over 10 rounds (\(=\)1 phase). In each round, the six A-participants in a group will be split up randomly in three pairs. Thus, each A-participant faces the same P-participant in all the 10 rounds of one phase, but is very likely to be paired with a different A-participant in each round.
1.2.2 The decision process
At the beginning of each phase, the P-participant determines a reward scheme for his/her group. The components of these reward schemes are explained below. After that, and knowing the reward scheme, the A-participants choose their action: each of the two A-participants in a pair independently chooses a number between 0 and 30.
Suppose that one A-participant chooses x and the other \(\hat{x}\). These choices are linked to costs of \(\frac{1}{2}x^2\) and \(\frac{1}{2}\hat{x}^2\), respectively. The choice of x is linked to an output of \(y=x+\varepsilon \), and the choice of \(\hat{x}\) is linked to an output of \(\hat{y}=\hat{x}+\hat{\varepsilon }\). \(\varepsilon \) and \(\hat{\varepsilon }\) are independently and evenly distributed random variables in the intervals \(0\le \varepsilon \le 40\) and \(0\le \hat{\varepsilon }\le 40\). In other words, any possible value of \(\varepsilon \) and \(\hat{\varepsilon }\) is equally likely to occur, and both random variables are drawn independently from each other.
If the output of the A-participant who chose x is larger or equal to the output of the A-participant who chose \(\hat{x}\), i.e., \(y\ge \hat{y}\), the A-participant who chose x earns \(cy+a+b(y+\hat{y})-\frac{x^2}{2}\), and the A-participant who chose \(\hat{x}\) only earns \(cy- \frac{\hat{x}^2}{2}\). In other words, only the A-participant whose output is not smaller than the output of the other A-participant in the pair, receives the extra payment \(a+b(y+\hat{y})\).
The first part of the extra payment, a, does not depend on the total output \(y + \hat{y}\) of a pair, while the second part of the payment, \(b(y + \hat{y})\), increases linearly with the total output \(y+\hat{y}\) - if and when b is larger than zero.
The payment of cy and \(c\hat{y}\) is independent of whether \(y\ge \hat{y}\). Thus, when c is larger than zero, the payment of cy and \(c\hat{y}\) ensures that A-participants receive a payment that increases in their individual output.
The P-participant earns a constant amount of 20 ECU for each unit of output, minus the payments to the six A-participants. For each pair of A-participants, the P-participant earns \((20-c-b)(y+\hat{y})-a\).
The P-participant is not free to choose any possible reward system (a, b, c), but must choose one of the following 15 rewards systems, where the first, second and third numbers in each cell stand for a, b, and c:
The experiment ends after three phases (30 rounds). Your payment is the sum of all your earnings in all periods. This sum is converted to Euro with the following conversion rate: 1 Euro \(=\) 4000 ECU.
You will be paid privately in cash at the end of the experiment.
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Güth, W., Levínský, R., Pull, K. et al. Tournaments and piece rates revisited: a theoretical and experimental study of output-dependent prize tournaments. Rev Econ Design 20, 69–88 (2016). https://doi.org/10.1007/s10058-015-0184-7
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DOI: https://doi.org/10.1007/s10058-015-0184-7