 Well-written or witty responses from anyone are considered, and controversial issues frequently produce a torrent of letters.For example, the survey of corporate social responsibility, published January 2005, produced largely critical letters from Oxfam, the World Food Programme, United Nations Global Compact, the Chairman of BT Group, an ex-Director of Shell and the UK Institute of Directors.In an effort to foster diversity of thought, "The Economist" routinely publishes letters that openly criticize the paper's articles and stance.