How do you measure a better writer? It depends on what the purpose of the writing is. If it is an author directly selling books then you measure by books sold. If it is an online publication you can conduct surveys to determine the impact of a particular writer on subscription or view rates. If it is a techincal writer doing product documentation you can measure based upon meeting schedule, number of defects and by conducting customer surveys.
> If it is an author directly selling books then you measure by books sold.
This is a fairly lousy metric. It depends enormously on the marketing campaign and the ability of salesmen to sell it.
For example, I read an article about the author of the "Slow Horses" book. It languished for years selling at a rate that was indistinguishable from zero. Then some journalist read it, wrote a glowing review of it, and it took off. Now it's a best seller, with sequels, and a miniseries.
For workers who work with their heads, "metrics" is a fantasy. How do you measure a better writer?