3
Jakopin, 2005; Thomson, 1999). Simply put, the argument in this literature goes like this:3 when regulated
firms are engaged in hostile and high-transaction cost relationships with their regulatory authority, and
since they do not have the opportunity to solve this transaction cost problem through vertical integration,
they tend to diversify out of their core business and in unregulated activities. Russo (1992) finds support
for this argument for U.S. electric utilities. Kashlak and Joshi (1994) make a similar type of argument but
point out that, instead of going into unregulated activities, regulated firms might also invest in
international diversification if the firm’s home market displays slow growth. They also find some
empirical support for it by looking at U.S. telecommunications operators.
From a theoretical point of view, however, this literature presents at least three limitations related to (1)
what makes firm-regulator relationships hostile, (2) the lobbying strategies that the firm could potentially
use to alleviate these hostile relationships, and (3) the lack of distinction between international and
product diversification. Below we discuss these three aspects.
Limitation 1: Firm-regulator hostile relationship.
Several studies have reported the often hostile nature of the regulated firms-regulators relationships. In
public utilities and network industries, in effect, there are plenty of sources of potential disagreements
between regulated firms and regulators. Among these, one can find (1) the proper valuation of capital
stock and asset values, essential for setting appropriate tariffs and/or rates of return, (2) the allocation of
licences to operate and the changing of the rules regarding these licences, or (3) the extent to which new
entrants should be protected to promote competition (Parker, 2003). However, in the literature on
regulated firms’ diversification strategies, the real nature of the potentially hostile firm-regulator
3 Here, we leave aside ‘non-strategic’ types of explanations for regulated firms’ diversification, such as for instance
the free cash-flow hypothesis (Jensen, 1986). According to this hypothesis, managers of firms with weak internal
and external governance environments and limited opportunities for profitable growth in their core businesses will
divert resources into diversifying strategies, even where the latter involve investments with negative net present
values. This type of argument might explain some of the variance in regulated firms’ diversification performance,
but we concentrate here on aspects related to firms’ external environment rather than internal and governance
aspects.