Blog content art and commerce 1000 words each

I need some written content for two blogs I host. Each writing 1000 words.
I would like a writing on the art of impressionists, particularly how they use light in their work.
I would like 2 writings on the economic climate and how the phenomenon of popular economic systems like traditional, command and market play a role as advantageous and less advantageous. Please give some examples for the reader as well.