The phrase "a single firm or" is correct and usable in written English.
It can be used when discussing options or alternatives involving one specific company or entity among others.
Example: "The study focused on the impact of regulations on a single firm or multiple firms within the industry."
Alternatives: "one company or" or "an individual firm or".
In energy, for example, it could start with a single firm or power generation alone.
Spreading out their money protects them from the risks of a single firm or adviser.
Investors like to believe not only that they're smart, but that financial scandals are isolated blights confined to a single firm or sector.
In an interview with Ezra Klein yesterday, Mr Stern talked about the need for the labour movement to move away from a model that treats workers as employees of a single firm or even as members of a single profession.
From these facts, the court has inferred that if a single firm or cartel controlled the licensing of all Intel-compatible PC operating systems worldwide, it could set the price of a license substantially above that which would be charged in a competitive market -- and leave the price there for a significant period of time -- without losing so many customers as to make the action unprofitable.
The real issue is that some institutions expose the entire financial system to risk by decisions taken within a single firm or business unit.
But, although the writing has a coarse vigour, Andersen seems unsure whether he is showing a single firm on the skids or the possible collapse of the City of London as an institution.
A production function can be used to represent output production for a single firm, for an industry, or for a nation.
This is often the case in knowledge-intensive industries or where knowledge of several research fields is required and therefore a single firm would find it challenging or even impossible to keep up with the latest developments in all related fields.
This is where the third approach to B2B private exchanges comes in.Unlike public exchanges and consortia, which bring together many buyers and sellers, private exchanges allow a single firm to deal with its customers or suppliers directly, and to control who sees what.
Then, we analyze how the observed effects of subsidies on R&D intensity and employment vary over time, vary if the firm receives also support from other sources, vary depending on how many supported projects a single firm has at the same time or vary if a firm gets support consecutively.
