Economics 1021A/B Lecture 16: Economics 1021A - Lecture 16

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Announcements: you have a tutorial quiz on friday on chapter 6. Example: suppose your mark in history, your only course, is 80%. (your average is 80%. ) Next semester you take economics, and your mark is 90%. Your average will go up because your marginal course is higher than your average (now 85%. ) In the summer you take physics, and you get a 60%. Your average will fall because 60% is lower than your average (now 72. 5%. ) When your marginal product is below your average, your average product falls. If (cid:455)ou hire a (cid:449)orker a(cid:374)d that (cid:449)orker does(cid:374)"t (cid:373)eet the a(cid:448)erage, it (cid:449)ill pull your average down. If you hire a worker and that worker exceeds the average, it will pull your average up. *on cost curves, the x-axis is output and the y-axis is cost: fixed costs, a cost you have to pay regardless of how much you produce, eg. if you own a factory, you own the building.

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