Some providers of single-country ETFs address concentration risk by using a "modified market weighting" to limit their exposure to a country's giant stocks, or simply by focusing on stocks of smaller companies.

WSJ: Single-Country ETFs: Risky Ventures

That said, if you are going to say it is worth the trade-off, you really owe it to the reader to also address the negative ramifications of single-payer.

FORBES: Obamacare Fee Will Cost You

To me, an endpoint is a single-user device with a human interface and an IP address.

FORBES

With this huge sum of money Apple could address global biodiversity loss in an instant by single-handedly supporting the efforts to save thousands of endangered species, enlarging protected area networks for biodiversity and indigenous peoples and providing sustainable livelihoods for millions of others, not to mention all those disappearing North American apple habitats.

FORBES: Four Ways Apple Could Spend $80 Billion

And that would, in a single stroke, address a significant portion of the concern about the so-called fiscal cliff.

WHITEHOUSE: Press Briefing

And that is an illustration of the fact that it is not always best to try to address two challenges with what in the policy world we call a single-policy instrument.

NEWYORKER: Greening the Ghetto