This issue has arisen in my department several times, particularly during discussions about merit increases. One perspective is that the length of an article or book is an index of the amount of work put into the publication. Another perspective is that we should focus on the quality of the work, rather than its length. Also, different fields have different types of expectations and limitations about length, particularly when it comes to articles. I work in an interdisciplinary department, so this issue arises on occasion. I'm interested to know what others think about this.