Leff defines "business group" as a group of companies that does business in different markets under common administrative or financial control whose members are linked by relations of interpersonal trust on the basis of similar personal ethnic or commercial background. One method of defining a group is as a cluster of legally distinct firms with a managerial relationship. The relationship between the firms in a group may be formal or informal. A
keiretsu is one type of business group. A
concern is another. Douma and Schreuder (2013) distinguish "horizontal" and "vertical business groups" as follows: 'Business groups can be horizontal or vertical as far as their structure is concerned. In a horizontal business group there is no central holding company – the group companies are connected through various formal or informal ties, including reciprocal shareholding. Thus, a horizontal business group is a rather loose confederation of firms. Coordination between them is achieved mainly by mutual adjustment and standardization of norms. Mitsubishi is a well-known example of a horizontal business group as are many other
keiretsu. Chinese groups exhibit similar features. Horizontal business groups are also referred to as "associative business groups". A vertical business group is a group of companies controlled, but not entirely owned, by a single investor. Vertical groups are often organized as pyramids of companies controlled by the main investor through a holding company. A unique feature of pyramidal holdings is that it allows the main investor to exert control with a limited amount of capital. Korean
chaebols, Indian business houses and most European business groups are vertical in character. Vertical business groups are also referred to as "hierarchical business groups". Encarnation refers to Indian business houses, emphasizing multiple forms of ties among group members. Powell and Smith-Doerr state that a business group is a network of firms that regularly collaborate over a long time period. Granovetter claims that business groups lie between markets and hierarchies; this is further worked out by
Douma & Schreuder. Khanna and Rivkin suggest that business groups are typically not legal constructs though some regulatory bodies have attempted to codify a definition. In the
United Arab Emirates, a business group can also be known as a
trade association. Typical examples are
Adidas Group or
Icelandair Group. ==See also==