Last week we started a series of letters on the topics I think we need to research in depth as we try to peer into the future and think about how 2015 will unfold. In forecasting US growth, I wrote that we really need to understand the relationships between the boom in energy production on the one hand and employment and overall growth in the US on the other. The old saw that falling oil prices are like a tax cut and are thus a net benefit to the US economy and consumers is not altogether clear to me. I certainly hope the net effect will be positive, but hope is not a realistic basis for a forecast. Let's go back to two paragraphs I wrote last week:

Texas has been home to 40% of all new jobs created since June 2009. In 2013, the city of Houston had more housing starts than all of California. Much, though not all, of that growth is due directly to oil. Estimates are that 35–40% of total capital expenditure growth is related to energy. But it's no secret that not only will energy-related capital expenditures not grow next year, they are likely to drop significantly. The news is full of stories about companies slashing their production budgets. This means lower employment, with all of the knock-on effects.

Lacy Hunt and I were talking yesterday about Texas and the oil industry. We have both lived through five periods of boom and bust, although I can only really remember three. This is a movie we've seen before, and we know how it ends. Texas Gov. Rick Perry has remarkable timing, slipping out the door to let new governor Greg Abbott to take over just in time to oversee rising unemployment in Texas. The good news for the rest of the country is that in prior Texas recessions the rest of the country has not been dragged down. But energy is not just a Texas and Louisiana story anymore. I will be looking for research as to how much energy development has contributed to growth and employment in the US.

Then the research began to trickle in, and over the last few days there has been a flood. As we will see, energy production has been the main driver of growth in the US economy for the last five years. But changing demographics suggest that we might not need the job-creation machine of energy production as much in the future to ensure overall employment growth.

When I sat down to begin writing this letter on Friday morning, I really intended to write about how falling commodity prices (nearly across the board) and the rise of the dollar are going to affect emerging markets. The risks of significant policy errors and an escalating currency war are very real and could be quite damaging to global growth. But we will get into that next week. Today we're going to focus on some fascinating data on the interplay between energy and employment and the implications for growth of the US economy. (Note: this letter will print a little longer due to numerous charts, but the word count is actually shorter than usual.)

But first, a quick recommendation. I regularly interact with all the editors of our Mauldin Economics publications, but the subscription service I am most personally involved with is Over My Shoulder.

It is actually very popular (judging from the really high renewal rates), and I probably should mention it more often. Basically, I generally post somewhere between five and ten articles, reports, research pieces, essays, etc., each week to Over My Shoulder. They are sent directly to subscribers in PDF form, along with my comments on the pieces; and of course they're posted to a subscribers-only section of our website. These articles are gleaned from the hundreds of items I read each week – they're the ones I feel are most important for those of us who are trying to understand the economy. Often they are from private or subscription sources that I have permission to share occasionally with my readers.

This is not the typical linkfest where some blogger throws up 10 or 20 links every day from Bloomberg, the Wall Street Journal, newspapers, and a few research houses without really curating the material, hoping you will click to the webpage and make them a few pennies for their ads. I post only what I think is worth your time. Sometimes I go several days without any posts, and then there will be four or five in a few days. I don't feel the need to post something every day if I'm not reading anything worth your time.