Skyscraper Index
... that the Skyscraper Index has shown that the world's tallest buildings have risen on the eve of economic downturns?
... that the <b id="mwFRA"><a href="./Skyscraper_Index" id="mwFRE" rel="mw:WikiLink" title="Skyscraper Index">Skyscraper Index</a></b> has shown that <a class="mw-redirect" href="./List_of_tallest_buildings_in_the_world" id="mwFRI" rel="mw:WikiLink" title="List of tallest buildings in the world">the world's tallest buildings</a> have risen on the eve of <a class="mw-redirect" href="./Economic_downturn" id="mwFRM" rel="mw:WikiLink" title="Economic downturn">economic downturns</a>?