Match the following : 1. causality, 2. deprivation, 3. empirical, 4. laissez-faire, 5. normalcy, 6. productivity (a) the law that states every action has an effect on something else (b) the worker's level of output in goods or services over a given period (c) the state of being normal (d) the condition of being without basic necessities for long periods (e) knowledge based on observation and experiment rather than theory (f) in economics, a government's lack of involvement in private industry.