Anadarko Petroleum typically announces its earnings calls and investor events on its corporate website under the investor relations section. These events are important opportunities for stakeholders to gain insights into the company's financial performance, strategic initiatives, and market outlook. In general, earnings calls are held quarterly, following the release of financial results, allowing analysts and investors to ask questions and receive updates directly from company executives. It is always a good idea to check Anadarko's official website regularly for the most current information regarding upcoming events and any changes to the schedule. Additionally, they may provide downloadable materials or transcripts of past calls for those who are interested in reviewing previous discussions.