I’m an economist, podcaster, producer, and the owner of Graukaue.
Graukaue
Graukaue (Gray Coe) is my podcast studio at the Fürst Leopold Coal Mine in Hervest-Dorsten.
Shows
The pits. There's Graukaue 2 and Graukaue 1.
Graukaue 2
This is the English-language pit.
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Underground with Michael Holtkamp Under the roof of the Gray Coe there are countless microphones, with each microphone being suspended from the ceiling just like a clothes hook. At the beginning of a shift, each miner lowers his microphone, like the announcer in a boxing ring did in the past. When the bell rings three times, the crew goes down into the mine. Glückauf! |
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Graukaue 1
This is the German-language pit; see graukaue.ruhr.
Audio podcasts
All shows' audio versions are available at Graukaue.ruhr. You can subscribe to the podcasts via their feeds as well as on the platforms listed below.
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Apple Podcasts
YouTube Music
Video podcasts
All shows' video versions are available on Graukaue's YouTube channel at youtube.com/@graukaue. You can subscribe to the channel as well as to the podcasts.
Graukaue (Studio)
YouTube
Bio
I'm an economist. My fields of interest are spatial economics, economic geography, urban/regional/international economics, transport economics, international trade and microeconomics. I'm the owner of Graukaue, and work as freelance podcaster and producer. I was previously employed at Kiel University's Institute for Environmental, Resource and Spatial Economics (formerly Institute for Regional Research) and Chairs of International and Regional Economics as well as Environmental and Energy Economics. I also received my PhD from Kiel University, for my dissertation on the wider impacts of transport infrastructure investments, after my undergraduate studies of International Economics at Kiel University and Jönköping International Business School in Sweden. Before graduating with my high-school diploma from Berufskolleg Bottrop, I spent time in the USA and in Chile as an exchange student.
Dissertation
The Wider Impacts of Transport Infrastructure Investments
Agglomeration and Imperfect Competition in General Equilibrium
The wider impacts of transport infrastructure investments are pecuniary externalities that are commonly alleged to be positive. At least when inferred from partial equilibrium analysis, this can be viewed as reasonable. Though, for an economy with limited resources, it might be reasonable to presume that positive wider impacts are redistributive effects rather than self-contained benefits. If they are, what is the sign of the net wider impact? To study this sign and its determinants, I set up various general equilibrium models of spatial economies in which the costs of transportation are brought down by means of some tax-funded scheme. Applying two separate classes of models, I study the wider impacts both from imperfectly competitive markets in the wider economy and from the agglomeration of economic activity. The former comprehends monopolistic, duopolistic and monopolistically competitive markets, including one with endogenous firm entry. The latter is a New Economic Geography model that is devised as to allow for a welfare analysis. The signs of the wider impacts are found to be highly ambiguous.
Signals
The bell system. This is how I communicate with the outside world.
