How should we spell MicroFranchising?

It might seem like a trivial topic but it has been something I've flucuated on as I have written this blog. I've seen it spelled as one word with a capital F (MicroFranchising), with a hyphen (Micro-Franchising), one word lower case (microfranchising), and even as two words (Micro Franchising).

I would think it would follow the other 'micro'terms, i.e. microcredit, microfinance, microenterprise, microinsurance, etc, which seem to have come to a consensus as single words without hyphens or special capitalization. But perhaps there are different opinions.