The paper by Sloof, Oosterbeek, and Sonnemans [2007] provides an experimental investigation of the following bargaining situation. Two parties A and Β face a choice among four complete contracts with the labels yellow, green, blue, and white. Each of these contracts fully specifies a price that obtains if A performs, and damages that Β receives if A breaches the contract. After both have agreed on the contract, party A observes a random move of nature before he must take a binary decision, referred to as the breach decision. All uncertainty has been resolved at that stage, so that a rational player would simply maximize his payoff. Indeed, as it turns out, player A almost always does so in the experiment as well. Hence, to simplify, I assume in the following that this last stage of the game is played well in line with rational choice. The breach decision, however, turns out to be the only stage of the game where rational behaviour is confirmed. One out of the four contracts is initially defined as the default option by the setup before a party is given the opportunity to propose one of the other contracts on a take-it-or-leave-it basis. If the second party accepts, the proposed contract applies. Otherwise, the relationship is governed by the default contract. Under the breach decision that maximizes A' s payoff, the yellow and green contracts lead to identical outcomes. In fact, both players obtain constant payoffs, 234 for A and 56 for B, because it is never optimal for A to breach and, by assumption, uncertainty affects payoffs only in cases of breach. The blue contract leads to a constant payoff of 80 for party B, but, since A breaches with positive probability, As payoff remains uncertain from the ex ante perspective. In fact, A' s payoff is 210 with probability 3/s but may increase up to 490. His expected payoff amounts to 266. Under the white contract, finally, both parties are exposed to risk. Party Β receives payoff 280 with probability Vs, and 0 with probability %. Party A receives payoff 10 with probability Vs, but A' s payoff may increase up to 570. The expected payoffs of A and Β amount to 234 and 56, respectively, and are lower than under the blue contract.