In the advertising world, you’ve probably heard a lot about “return on investment.” How much money you spend on a campaign, and what that expenditure gets you, determines ROI. In other words, your return is how much value your ads bring to your business. Advertising is expensive and tricky....

Perfect Competition may be defined as many small firms manufactures and supplies the same goods (or perfect substitute) to the end-user while Monopolistic Competition is type of market where there are a handful of sellers offer a particular product leading to minimal competition, however, variants and quality of products offered by each seller are slightly different.