Technological obsolescence goes hand in hand with economic growth

January 19, 2016

The growth in the Gross Domestic Product (GDP) of countries is largely linked to technological advance, because the latter encourages productivity. This technological advance is often associated with capital owing to the replacing of machinery and equipment that it entails. This firstly influences the fact that capital accumulation increases a country's GDP, and secondly, the fact that the capital depreciates because the existing machinery becomes obsolete. Therefore, it has been proven that the countries with high capital depreciation have in the long term a high growth rate. A UPV/EHU researcher has built an economic model that takes this positive correlation into consideration. Her research has been published in the journal Economic Modelling.

The standard economic models used to analyse economic growth as well as fluctuations fail to reflect the evolution in capital depreciation properly. For this very reason, "traditional models regard this depreciation as constant," explained Ilaski Barañano, a researcher in the department of the Fundamentals of Economic Analysis I. In other words, they consider that all the machinery, technology, buildings, workshops, scientific equipment and everything else end up obsolete in a constant way and at a constant pace in all countries. Nevertheless, "the data obtained in different countries show that the capital depreciation rate changes over time", she added.

What is more, the researcher has observed in the research conducted with a researcher at the Pablo de Olavide University that a positive correlation exists between capital depreciation and in 101 countries. There is a correlation but no causality. Barañano explained that "the existence of a positive correlation between both variables does not mean that one is the cause of the other. The relation between the two variables is positive, nothing more".

Likewise, the standard models assume that the growth rate of a country's GDP trend is fixed. Barañano confirms that this assumption is also wrong and that the trend varies depending on economic fluctuations. Therefore, "when the economic fluctuations are favourable, productivity in the country receives a boost and, as a result, GDP grows in a constant way".

Barañano has explored the possible theoretical explanation that could account for the correlation existing between the long-term growth rate, the level of persistence and capital depreciation. To do this, she has put forward a simple economic in which economic growth coincides with economic fluctuations and depreciation is linked to obsolescence. So the countries that achieve significant improvements in the productivity of the investment sector will see a significant growth rate in their GDP due to the boosting of capital accumulation. What is more, this technological advance causes the capital depreciation rate to be higher as a result of the obsolescence. "The theoretical forecasts obtained in this model coincide with the correlations observed in the data, which gives the model credibility," concluded the researcher.

A tool designed to obtain theoretical forecasts

The model put forward is straightforward and easy to use. However, it does not include all the factors that affect real economies. For example, capital is not a homogeneous variable, it consists of various components but in this model is has been regarded as a single variable.

As it is a model that reflects the empirical evidence linked to persistence, the long-term growth rate and the loss of capital value "can therefore be used to forecast the effect that may be brought to bear by economic policies on growth and GDP in the long term, as the latter have a direct influence on the investment sector and technological advances facilitate the improving of productivity and, as a result, growth in GDP," explained the researcher.

Barañano is planning to work on adjusting the model. "In our model we have established capital as a homogeneous variable and we know it is not like that. So we want to differentiate between the different types of capital (in other words, buildings, machinery, scientific equipment, transport equipment, etc.), and after analysing each one separately, we want to see what weight each one has in depreciation."

Explore further: Governing economic growth in the cloud

More information: Ilaski Barañano et al. Long-term growth and persistence with obsolescence, Economic Modelling (2015). DOI: 10.1016/j.econmod.2015.08.014

Related Stories

Governing economic growth in the cloud

November 14, 2012

Gross domestic product (GDP) can be boosted by cloud computing, the system in which remote computers on the Internet are used to store, manage and process data rather than the users' local machines. A report to be published ...

Polluting China for the sake of economic growth

April 27, 2012

China's economic growth will continue to be energy-intensive and highly polluting for the foreseeable future with emissions and efficiency far below capital growth on the agenda, according to a study published in the International ...

Model shows how surge in wealth inequality may be reversed

July 30, 2015

(—For many Americans, the single biggest problem facing the country is the growing wealth inequality. Based on income tax data, wealth inequality in the US has steadily increased since the mid-1980s, with the top ...

Recommended for you

Plague likely a Stone Age arrival to central Europe

November 22, 2017

A team of researchers led by scientists at the Max Planck Institute for the Science of Human History has sequenced the first six European genomes of the plague-causing bacterium Yersinia pestis dating from the Late Neolithic ...

How to cut your lawn for grasshoppers

November 22, 2017

Picture a grasshopper landing randomly on a lawn of fixed area. If it then jumps a certain distance in a random direction, what shape should the lawn be to maximise the chance that the grasshopper stays on the lawn after ...

Ancient barley took high road to China

November 21, 2017

First domesticated 10,000 years ago in the Fertile Crescent of the Middle East, wheat and barley took vastly different routes to China, with barley switching from a winter to both a winter and summer crop during a thousand-year ...


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.