I cannot say that I was keen on New York City passing a law to force fast food restaurants to post the number of calories on the food items they sell. It struck me as a single state initiative that would cause of lot of bureaucratic difficulty for no very good reason.

Still, I am intrigued by the results, now that outlets have started to comply, and by the lesson that one’s instincts about which foods are calorie-rich are not always accurate.

A case in point: the Starbucks next to our office in Manhattan, which now has calorie labels on its cakes and pastries.

So, which one of these would you guess had the most calories and which the least?

1. A slice of marble cake with a chocolate swirl in it

2. A slice of banana nut loaf

3. A slice of lemon cake

The answer is 3. For the record, the first has 430 calories, the second 460 calories and the last 500 calories. Somehow, I was fooled by the fact that lemons sound healthy, and nuts and bananas natural, while chocolate sounds sinful.

Just goes to show. Mind you, I am still not sure that I favour the law.

If Warren Buffett does team up with Mars to buy Wrigley for more than $22bn, it will be not only a quintessential Buffett deal but a reminder of where value lies in a downturn.

Mr Buffett has a sweet tooth, not only personally (he is known for his devotion to Cherry Coke) but as an investor. Berkshire Hathaway’s 8 per cent stake in Coca-Cola is among his longstanding stakes in big consumer brands.

Famously, confectionery companies are often good investments during in recessions as people cut back on luxuries and comfort themselves with small indulgences such as chocolate bars.

They also meet the Buffett test, which he used recently to justify not taking a stake in Google, that he has to be able to grasp a company’s product and the sustainability of its competitive edge.

One might put chewing gum at the opposite end of the scale to Bear Stearns. Mr Buffett was said to have discussed taking a stake in the Wall Street firm last September but rejected the idea, which was a smart decision.

He has more faith in chewing gum than credit derivatives.

The world moves fast these days. Barely has one heard of something than it turns into a phenomenon.

Take the Clover filter coffee machine, which I learned the other day from perusing a local blog is an $11,000 machine that somehow makes better filter coffee than almost any of the alternatives.

It is being installed in a coffee bar that is about to open up near the subway station I use every morning so I was planning to go in and try a sip.

Now Starbucks announces that it is buying the company that makes the Clover and will start installing the machines in all many of its outlets. It is part of Howard Schultz’s plan to bring some sorely-needed magic back to his chain.

If all Clovers are going to be commandeered for Starbucks outlets, does that mean it will try to confiscate the Clovers that are already out there? Presumably not, in which case my  local machine will have scarcity value.

Somehow, however, my anticipation of trying a Clover-brewed coffee has been spoiled by the disclosure that there will shortly be one on every street corner.

I am encouraged to return to the topic of supermarkets and plastic bags by the Daily Mail, my former employer (a long time ago). It has just launched a campaign to stop the proliferation of plastic bags in the UK under the slogan: Banish the Bags.

The Mail estimates that 13bn flimsy plastic bags are handed out by British high street stores each year. It is a classic example of companies and consumers not having to pay the financial cost of environmental destruction and therefore not caring about it.

There are some efforts to curb plastic bag use in the US but I have a suggestion for one thing that all US supermarkets could stop: the pernicious habit of “double-bagging”.

Most stores in New York hand out extremely flimsy and cheap plastic bags which tear if any heavy load is placed in them. The staff therefore routinely place every plastic bag in another one, thus doubling the number of plastic bags at a stroke.

This is an absurd practice that all stores, even if they do nothing else, ought to stop.

Further to my post the other day on the remarkable staying power of Marcel Ospel, the chairman of UBS, it seems the clock is ticking.

By cutting his term of office - and those of all board members - from three years to one, UBS is throwing a sop to investors who would like him to step down.

More generally, the problem of managerial entrenchment has always seemed to me to be bigger at continental European companies than those in the UK and US, where terms of office on board can often be short.

The tide is, however, moving in the Anglo-Saxon direction. It is bound to do so, given that investors have become more active and obstreperous in countries such as Germany and France.

There is a sort of irony here. The continental European institutions that have been the keenest to bring an “equity culture” to their countries have been the big banks such as Deutsche Bank and UBS. They have tried to break out of low-profit domestic retail banking into the volatile world of international investment banking.

Live by the sword, die by the sword. 

Further to my ode to the joys of Nestle’s Nespresso machine the other day, here is the New York Times obituary of Ernesto Illy of Illycaffè fame. He ran "the Bell Labs of coffee" in Trieste before Starbucks had opened its first store in Seattle.

Further to my admiration for the supermarket in Davos that did not offer me a plastic bag, I note that it is only part of Switzerland’s green credentials.

Yale University’s environmental performance index, which was released at Davos, places Switzerland top of the league on factors including air pollution, water quality, greenhouse gas emissions per head etc. The study notes that wealth correlates closely with environmental performance: the richer you are the more you tend to care about such things.

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I got a Nespresso coffee machine for Christmas this year and I have written an FT column about it. You can read it here and post comments below. Happy New Year.

A word of praise for my local coffee shop. It does indeed serve good coffee but another reason I like it is that it offers it in sizes "small, medium or large". Yes, that’s right. Not "tall, grande and venti". Or "large, extra-large and super-size".

My colleague Tim Harford has written elsewhere about how one now has to ask specially for a short cappucino in Starbucks as if is a samizdat item. The menu starts with tall.

More generally, the abolition of the notion that any serving or portion can be small - as if consumers will somehow feel short-changed - is irritating for fans of plain speaking.

I also like the fact that my local frozen yogurt shop calls its main flavour "ordinary". But that is another story.