<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:  What is the concept of supply and demand in economics ? Context: Supply and demand in economics is the theory that prices are determined by the relationship between how much of a product is available and how much of it people want to buy. Answer: [/INST]The theory that prices are determined by the relationship between how much of a product is available and how much of it people want to buy.</s>