A change in the index selection rules of Deutsche Börse provides a unique opportunity to investigate the drivers behind the decision to a bolish dual-class shares. As of June 2002, selection is based on the market capitalization of the free-float of the more liquid share class rather than the...

We examine initial public offerings (IPOs) with single, multiple, and no credit ratings. We document a beneficial effect of credit ratings on IPO underpricing, which is amplified by the existence of multiple credit ratings. Multiple ratings also reduce the extent of filing price revisions....