T he reformatting and changes that were made to the Asthma Control Questionnaire (ACQ) [1] for the Post-cold Asthma Control and Exacerbation (PAX) study [2] raise some important concerns about modifying validated questionnaires. Just like mechanical and electrical measurement instruments, validated questionnaires are precision measurement instruments. The only difference being that they measure...

Until Lotus and Apple sued their competitors for copyright infringement, software user interface designers did not think much about whether intellectual property law might impose some constraints on their design decisions. Even those who knew that copyrights were available to protect software probably understood this to mean simply that a person would have to write his or her own code to develo...

Judgment aggregation is concerned with the problem of aggregating individual views on logically related issues. It offers a general framework in which several different types of aggregation problems can be represented and studied. Furthermore, judgment aggregation can be applied to problems that consider together issues that are typically considered as separate aggregation problems. E.g., judgm...