primary factor

Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0
More than any architectural work, the completion of the harbour was the primaryfactor in the eventual success or failure of a settlement.
Pesticides, a primaryfactor of increasing yield, are affected by trade liberalization, as tariffs and subsidies are reduced and import restrictions lifted.
A description is a primaryfactor in deciding the characteristic of a case in which items for classifying similar cases are described.
People's working conditions are the primaryfactor in the formation of their attitude to work, and that directly affects people's retirement age preferences.
This structure is thus flexible enough to permit primaryfactor substitution in response to changes in the relative prices of primary factors and fertilizer.
Both interpretations could be true under different circumstances, but availability of alternative prey is rarely, if ever, considered as the primaryfactor driving the observed dynamics.
The authors concluded that it was the improvement in glycaemic control, rather than any specific therapy, which was the primaryfactor responsible for the reduced risk of complications.
They argue that statistical differences in direct and indirect estimates should not be the primary factor on which to make a decision whether to combine results.
However, because our results were adjusted for group differences in nonverbal mental age, we cannot be certain that level of development per se is the primaryfactor involved.
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