Letters to the Editor.

The letters to the editor refer to articles published in previous issues of "Harvard Business Review." A reader comments on "How to Get a Good Consultant," by Jean Pierre Frankenhuis, which is in the November-December 1977 issue. The comment is followed by an editors' note and a reply from the author. A Philip Kotler article about sales and marketing effectiveness is praised. Other topics include the costs of regulation, marketing effectiveness, zero-based budgeting, logistics, nonprofit organizations, action learning, restricted stock plans, and accounting for inflation.