Many factors may cause changes in demand, below is some of those factors:
- Change in Consumer’s tastes and preferences.
- Consumer income
- Prices of complementary products
- Prices of substitute products
- Change in population
- Expectation of future prices, change of incomes or availability.
- Change in age distribution and income distribution.
Green tea products in markets
Lately many health related programs and health reports assuring the great benefits of green tea to the body and to health of the human being.
With the increased awareness of the need to the healthy products, the demand on green tea bags increased in the last two years, as of the latest reports from the sales department in one of the biggest companies producing green tea in the Middle East .
Below is a table which shows the change in demanded quantities of green tea during the last two years:
Price$ | quantity demanded (in Ton) 2009 (per year) | quantity demanded (in Ton) 2011 (per year) |
5 | 50 | 60 |
10 | 45 | 55 |
15 | 40 | 50 |
20 | 35 | 45 |
25 | 30 | 40 |
30 | 25 | 35 |
The Graph below show the change in the Demand and the Quantity demanded
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