A by-business is anything which is secondary or subordinate to something else, or any business aside from the main business.
The scope of business economist expends to those fields of activity which are earned out bybusiness organisations ,business economists is concerned with solving all problems pertaining to business affairs.it referrs to policies of planing and development of business .The matter of bussiness economics is classified under the following broad heads:- a) consumer analysis with special emphasis on demand analysis and forecasting b)production and cost analysis. c)pricing decisions,policies&practice. d)profit managament. e)capital management. f)decision making.