Worth Reading

5-Year Growth of 100+ Subsectors of the U.S. Business Economy

By guest author Joe Newsum, a strategy and benchmarking expert, with over 20 years of experience supporting companies in developing and executing strategy. As CEO of Kentley Insights, Joe leads his team in providing companies with insightful industry and market data. Previously, Joe was a strategy consultant at McKinsey & Company and Mercer Management Consulting. He has an MBA from the Tuck School of Business at Dartmouth and a B.S. from Stanford University.

In 2018, the U.S. business economy was USD 37 trillion, representing the total revenue generated by private companies (including intermediate products, which are not included in GDP figures). Over the past 5 years, the U.S. business economy has grown 3.2 % annually for a total growth of USD 5.4 trillion. Yet, growth has been very uneven across sectors.

Below details out the 5-year growth (2013-2018) of the 100+ subsectors within the services, retail, construction, manufacturing, wholesale, mining and agriculture sectors that make up the U.S. business economy.

The project is by Kentley Insights, one of MarketResearch.com’s publishers of data-rich market research reports covering over 1,000 industries. Consulting agencies, private equity firms, banks and companies use reports by Kentley Insights to access industry data and benchmarks.

Fastest Growing Sectors in the U.S.

The service sector contributed over 60 % of total absolute growth at USD 3.5 trillion. The construction sector led in percentage growth at 7.5 % annual growth, with the services sector at 5.4 %, and retail at 3.8 %. The rest of the sectors lagged in growth at between -1 % to 1 % annual growth.

Growing and Declining Subsectors

Below are the 5-year absolute revenue growth percentages for the subsectors. Lodging construction led subsector growth at 137 %, followed by online retailers at 70 %. Wheat and barley led subsector declines at -50 % and -44 %. The data is sourced from the Census Bureau and Kentley Insights.

Are any of these growth industries surprising to you? What about the industries in decline? Please comment on what you find interesting in the data.

Interested to see more data? Be sure to check out an interactive chart on the U.S. economy by Kentley Insights that shows the total revenue generated by hundreds of different industries.



Effect of fibre length on the tensile strength of unidirectionally arrayed chopped strands

This study – by authors I. Taketa, H Matsutani, – Advanced Composite Materials is commercially available and investigates the effect of fibre length on the tensile strength for discontinuous fibre composites. A composite with a staggered structure of fibre bundles were prepared by stacking prepreg sheets with unidirectionally arrayed chopped strands with a predetermined fibre length. The sheets were prepared by introducing fine slits at regular intervals along the fibre direction. The final failure is caused by an unstable growth of delamination from the tip of the bundles. The conventional linear fracture mechanics model cannot explain the reduction in the tensile strength as the fibre length shortens. Consequently, this paper proposes a novel fracture mechanics model that considers a non-linear stress–strain relation for the composite, which incorporates varying fibre length. The results confirm that this model can explain the relation between the tensile strength and fibre length very well, without any fitting parameters.


Climate finance for developing countries reached USD 71 billion in 2017 states OECD

Climate finance provided and mobilised by developed countries for climate action in developing countries reached USD 71.2 billion in 2017, up from USD 58.6 billion in 2016, according to new estimates from the OECD.

While the 2016 and 2017 totals cannot be directly compared with earlier years due to improvements in data and methodology relating to private finance, , Climate Finance Provided and Mobilised by Developed Countries in 2017 shows the overall trend is upwards.

“The goal to reach USD 100 billion in annual climate finance by 2020 is still attainable, but we must urgently step up our efforts to provide public climate finance and improve its effectiveness in mobilising private finance,” said OECD Secretary-General Angel Gurría.

The report gives estimates for mobilised private finance and public flows (estimates on public flows were already published in November 2018). It shows public climate finance is increasing again, after stalling in 2015, and is consistent with projections made by the OECD in 2016. Estimates of private finance in 2016-17 suggest that more needs to be done.

“Our estimates for 2013-2017 show that developed countries are making progress on climate finance and the indications are that this upward trend will continue. Multilateral development banks are reporting a significant rise in their climate finance outflows in 2018, which we will be analysing as soon as their activity-level data is available to us,” said Mr Gurría.

The amount of climate finance going to adaptation activities rose to USD 13.3 billion in 2017 from USD 9.1 billion in 2013, meaning adaptation now accounts for 19 % of total climate finance, up from 17 % in 2013. The share of climate finance going to mitigation activities was 73 % in 2017, compared to 76 % in 2013, with the rest going to crosscutting activities.

For public climate finance, the ratio of grants to loans was relatively stable over 2013-17. Grants made up over a third of bilateral and about 10 % of multilateral finance, while loans represented 60 % of bilateral and nearly 90 % of multilateral finance. The share of grants in public climate finance in 2016-17 is higher for least-developed countries (36 %) and small-island developing states (54%) than for developing countries as a whole (24 %).

The private component of climate finance consists of private funding for climate projects mobilised by developed countries’ public climate finance instruments. These include investments in companies and special purpose vehicles, loan guarantees, credit lines, loan syndications and co-financing schemes. The public component consists of bilateral climate finance and multilateral climate finance attributable to developed countries. Officially supported climate-related export credits are accounted for as a separate component.

Climate finance will be among the issues discussed at the upcoming UN Climate Summit in New York and in the run-up to the COP25 climate talks in Santiago de Chile.

Working with over 100 countries, the OECD is a global policy forum that promotes policies to improve the economic and social well-being of people around the world.

Download a summary of key findings

Download the full report


Effects of nanoparticles size and interactions on dielectric properties of polymer matrix flexible dielectric nanocomposites

By the authors Youngho Jin, Yunki Gwak, Rosario A Gerhardt – Advanced Composite Materials

Effects of particle size on the dielectric properties of polymer matrix flexible nanocomposites were studied. Synthesized barium titanate (BaTiO3; BT) nanoparticles (NPs) with different sizes were effectively dispersed in the matrix polymer using a simple phase separation method. The dielectric responses of free-standing thin composite films were studied by impedance spectroscopy. The interactions between nanoparticles were also studied by finite element analysis and compared with experimental data using a time harmonic-electric current solver in the AC/DC module of COMSOL Multiphysics® 5.2. The dielectric permittivity of polymer matrix nanocomposites was remarkably affected by the BT particle size, while the dielectric loss did not show any noticeable changes. The real permittivity exhibited the highest value when the BT particle size was near 100 nm. The calculated energy density based on measured real permittivity and breakdown strength was as high as 17.24 J/cm3. The dielectric properties of polymer matrix nanocomposites can be improved by controlling the particle size of nanofillers in conjunction with surface treatment of fillers.