Final answer:
The vegetable with the highest selling price can vary, but organic strawberries have seen higher prices due to increased demand from consumer concerns over pesticide residue. The Environmental Working Group's 'Dirty Dozen' list significantly influenced this demand, leading to higher equilibrium prices for organic strawberries.
Step-by-step explanation:
The question of which vegetable has the highest selling price can vary depending on factors like location, seasonality, and consumer demand. However, an example of a vegetable that has seen an increase in both demand and selling price is organic strawberries. According to the Environmental Working Group's "Dirty Dozen" list released in April 2013, strawberries were found to have high levels of pesticide residue, even after washing. This notice spurred an increase in the demand for organic strawberries, leading to higher equilibrium prices and sales quantity.
It's important to understand that market dynamics such as supply and demand affect the selling price of vegetables. In general, if a vegetable is perceived to be healthier or safer, as in the case of organic strawberries, consumers may be willing to pay more, driving up the equilibrium price. This concept is also applicable to small-scale markets. For instance, small roadside produce markets and small organic farmers often operate in close to perfectly competitive markets, meaning the selling prices there tend to closely reflect the market equilibrium.