<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  Why do prices rise when demand exceeds supply? Context: Prices rise when demand exceeds supply because sellers can charge higher prices as consumers are willing to pay more to secure the limited quantity available. Answer: [/INST]This is because when demand exceeds supply, sellers can charge higher prices as consumers are willing to pay more to secure the limited quantity available.</s>