I wrote in June about early numbers from research being conducted at the University of Maimi that attempted to quatify the impact of a Walt Mossberg review on a company’s stock price:

Initial data shows on average, “firms with bad product reviews saw stock losses of $200 million, while those with positive reviews saw gains of $500 million,” proving traditional media influencers still pack a punch.

The research study, The Value of Quality: Stock Market Returns to Reviewed Quality of New Products, has now been published and can be downloaded without charge from the Social Science Research Network.

The research was conducted under the following premise: “Firms are always in a rush to bring new products to market. This attitude is probably driven by several factors such as capturing market share rewards to new products, shaping consumer preferences, exploiting economies of experience, or pre-empting lucrative supplies, market positions, distribution outlets, and shelf space (Robinson and Fornell 1985; Carpenter and Nakamoto 1989; Kalyanaram, Robinson and Urban 1995)