The publisher of the influential German newsweekly "Der Spiegel" is to cut about 20% of its staff and begin charging for some articles online as it attempts to fight a decline in advertising and circulation. One of Europe's largest news magazines, it has a circulation of about 870,000. Known for its investigative reporting, it is seen as required reading for the German political, business and cultural elite. Its popular Web site can currently be accessed for free and includes some content from the magazine.