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had become the largest net exporter, shaping
world trade through its internal regime (Hagelberg
and Hannah 1994). The agreement ended in 1984
as new producers gained market share.
Tin
e International Tin Agreement (1954) sought
to raise and stabilize prices through export quotas
and inventory management. It initially succeeded,
but higher prices led to new producers (notably
Brazil) and substitution with other metals (like
aluminum). By 1985, it was unable to finance its
buffer stocks and collapsed, leading to price de-
clines and mine closures (Nappi 1990).
Wheat
The International Wheat Agreement (1949) creat-
ed a multilateral contracting system under which
producers (consumers) would commit to maxi-
mum (minimum) prices (Goley 1950). Its opera-
tions were maintained for more than two decades
by intergovernmental trade, and it was renewed
several times, but it eventually failed to stabilize
prices and collapsed in 1971, in the early stages of
the commodity price boom.
Though ineffective at stabilizing prices beyond the
short term, many ICAs (e.g., the International
Cocoa Organization, the International Coffee
Organization, and the International Sugar Organi-
zation) evolved and engaged in market monitor-
ing, gathering and providing intelligence, and
technical assistance. These bodies preserved insti-
tutional knowledge, offered neutral producer—
consumer platforms, and remain sources of exper-
tise within the broader network of International
Commodity Bodies and International Study
Groups.
Oil agreements
Pre-1973 oil arrangements
After oil was discovered in Pennsylvania in 1859,
prices became highly volatile, swinging through
boom-and-bust cycles with destabilizing conse-
quences for producers and consumers. Early pro-
ducer groups, starting with the Oil Creek Associa-
tion in 1861, attempted to restrict output and
raise prices but proved unsuccessful (table SF.3).
Price volatility subsided once Rockefeller’s Stand-
ard Oil Trust consolidated the industry, bringing
greater stability between the 1870s and the 1910s
(McNally 2017). However, following the breakup
of the Trust under U.S. antitrust law in 1912,
price volatility re-emerged. In the 1930s, control
of pricing shifted to seven multinational, vertically
integrated oil companies, in which global produc-
tion was highly concentrated (Adelman 1972).2
In addition, the Texas Railroad Commission
(TRC) introduced prorationing in the 1930s to
manage surplus capacity, while federal oil import
controls began in 1959 under the Mandatory Oil
Import Program (Blair 1978).3 Between 1960 and
1972, the volatility of oil prices was among the
lowest of traded industrial commodities, support-
ing rapid postwar demand growth of nearly 8
percent annually. By the early 1970s, however, the
global dominance of the major oil companies
waned, and U.S. surplus capacity dissipated, pav-
ing the way for OPEC’s rising influence.
OPEC was founded in 1960 with the objective to
“coordinate and unify petroleum policies among
member countries, in order to secure fair and
stable prices for petroleum producers” (OPEC
2020).4 The República Bolivariana de Venezuela,
the group’s largest producer in its early years,
accounting for more than one third of the group’s
combined output, proposed that the organization
be modelled after the TRC by withholding supply
to achieve higher prices (figure SF.3.A). Other
members, however, favored negotiating higher
posted prices with the multinational companies
2 The multinational companies, often called the “Seven Sisters,”
were British Petroleum (BP), Chevron, Exxon, Gulf, Mobil, Shell,
and Texaco (Sampson 1975).
3 Prorationing was the limiting of oil output from pools or wells
to balance supply and demand and was implicitly designed to
stabilize prices. It was mainly used in Oklahoma, Texas, and some
other oil producing states (McNally 2017).
4 OPEC—which as of 2025 comprises 12 member countries—
was established at the Baghdad Conference of September 10-14,
1960, by Iran, Iraq, Kuwait, Saudi Arabia, and República Bolivariana
de Venezuela. Others joined the organization later, including Qatar
(1961; withdrew in 2019), Indonesia (1962; withdrew in 2009,
rejoined in 2015, and withdrew again in 2016), Libya (1962), the
United Arab Emirates (1967), Algeria (1969), Nigeria (1971),
Ecuador (1973; withdrew in 1992, rejoined in 2007, and withdrew
again in 2020), Gabon (1975; withdrew in 1995, rejoined in 2016),
Angola (2007; withdrew in 2024), Equatorial Guinea (2017), and the
Democratic Republic of the Congo (2018).