What is the definition of drug demand? How to do the quantitative assessment for drug demand?

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Drug demand refers to the desire and need for drugs within a population, influenced by factors such as availability, social norms, and individual health.
To quantitatively assess drug demand, researchers can employ methods such as:
Surveys: Collecting data on drug use patterns, preferences, and demographics through structured questionnaires.
Epidemiological studies: Analyzing prevalence rates and trends in drug use across different populations over time.
Market analysis: Estimating the economic value of drug markets by assessing consumption rates and prices.
Treatment_data: Evaluating the number of individuals seeking treatment for substance use disorders as an indicator of demand levels.