The Great Merger Movement was a predominantly U.S. business phenomenon that happened from 1895 to 1905. During this time, small firms with little market share consolidated with similar firms to form large, powerful institutions that dominated their markets. It is estimated that more than 1,800 of these firms disappeared into consolidations, many of which acquired substantial shares of the markets in which they operated. The vehicle used were so-called trusts. In 1900 the value of firms acquired in mergers was 20% of GDP. In 1990 the value was only 3% and from 1998–2000 it was around 10–11% of GDP. Organizations that commanded the greatest share of the market in 1905 saw that command disintegrate by 1929 as smaller competitors joined forces with each other. However, there were companies that merged during this time such as DuPont, US Steel, and General Electric that have been able to keep their dominance in their respective sectors today due to growing technological advances of their products, patents, and brand recognition by their customers. The companies that merged were mass producers of homogeneous goods that could exploit the efficiencies of large volume production. However more often than not mergers were "quick mergers". These "quick mergers" involved mergers of companies with unrelated technology and different management. As a result, the efficiency gains associated with mergers were not present. The new and bigger company would actually face higher costs than competitors because of these technological and managerial differences. Thus, the mergers were not done to see large efficiency gains, they were in fact done because that was the trend at the time. Companies which had specific fine products, like fine writing paper, earned their profits on high margin rather than volume and took no part in Great Merger Movement.