Positive Economics talks about the facts and proven opinions of economics

Example : PPC Graphs is a graph used to check the maximum production that can be done between 2 goods or service, This is a proven fact in economics

Normative Economics talks about big theories of economics, it talks about unproven facts and other opinions from people

Example : There are many theories that have not been proven in economics, there are certain examples we could go through, capital theory, behavioural economics and etc

Behavioural Economics talks about the combination of psychology and economics

In economical terms it talks about the behaviour of producers and there thoughts of how they produce through psychology

Behavioural economics is considered a theory as there no proper evidence that proves this right, people mostly use behavioral economics to detect market failure and other human decisions that are taken in a economy

Mostly normative economics turns to positive economics but in certain cases positive economics can also become normative as certain facts can be questioned

For normative economics, positive economics is really important, just like classical physics is important for quantum physics, positive economics gives us a base about normative economics

Command Economy talks about the economy where the government are considered as the most important decision maker of the economy

In economies like these no decisions can be taken by the private firms, as the government controls as a major, these kind of economies are called command economies

In a economy like this there is no proper command economy but there are certain countries where government leads the majority of the decision making