E-nstructions facilitates the use of electronic instructions in computerized laboratory ex-periments in social sciences. In this article I provide a set of guidelines for the installationand the use of E-nstructions.

Relying on the specific example of ultimatum bargaining experiments this paperexplores the possible role of empirical knowledge of behavioural “norm(ative)facts” within the search for (W)RE – (Wide) Reflective Equilibria on normativeissues. Assuming that “pro-social” behaviour...