Which university are you at? <a href=" http://sildenafilmdbuy.com/maps/sitemap41.html#block ">ventajas de tomar viagra</a> Political and public outrage about aggressive tax avoidance has created a &ldquo;once in a century&rdquo; opportunity to overhaul the international rules, which date back to the League of Nations in the 1930s, the OECD said. Pascal Saint-Amans, director of the OECD&rsquo;s centre for tax policy and administration, added: &ldquo;The golden era of 'we don&rsquo;t pay taxes anywhere&rsquo; is over.&rdquo;