An increase in the costs of production 2. An increase in the number of consumers in the market 3. A decrease in the number of producers in the market 4. Improved production technology 5. An increase in the price of a good considered a substitute by consumers 6. A decrease in the costs of production 7. An increase in the price of a good considered a complement by consumers 8. An increase in the number of producers in the market 9. A decrease in consumer income, assuming the product is a normal good 10. A decrease in consumer income, assuming the product is an inferior good