Mergers, Innovation, and Entry-Exit Dynamics: Consolidation of the Hard Disk Drive Industry, 1996–2016

2019 ◽  
Vol 87 (6) ◽  
pp. 2672-2702 ◽  
Author(s):  
Mitsuru Igami ◽  
Kosuke Uetake
Keyword(s):  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Competitive Effects ◽  
Dynamic Oligopoly ◽  
Disk Drive Industry ◽  
Equilibrium Relationships ◽  
Using Data ◽  
The Right ◽  
Current Rule

Abstract How far should an industry be allowed to consolidate when competition and innovation are endogenous? We develop a stochastically alternating-move game of dynamic oligopoly and estimate it using data from the hard disk drive industry, in which a dozen global players consolidated into only three in the last 20 years. We find plateau-shaped equilibrium relationships between competition and innovation, with heterogeneity across time and productivity. Our counterfactual simulations suggest the current rule-of-thumb policy, which stops mergers when three or fewer firms exist, strikes approximately the right balance between pro-competitive effects and value-destruction side effects in this dynamic welfare trade-off.

A Simulation of the Number of Particles Trapped by the Circulating Filter of a Hard Disk Drive and their Trajectories

2014 ◽  
Vol 548-549 ◽  
pp. 953-957 ◽  
Author(s):  
Jatuporn Thongsri ◽  
Vana Pongkom
Keyword(s):  
Shear Stress ◽  
Hard Disk Drive ◽  
Hard Disk ◽  
Disk Drive ◽  
Optimal Placement ◽  
Discrete Phase Model ◽  
Discrete Phase ◽  
Fluent Software ◽  
The Right ◽  
Number Of Particles

A transition shear stress transport turbulence model and a discrete phase model of Fluent software were employed to simulate numerically the trajectories of loose particles and the number of them trapped by the circulating filter of a hard disk drive (HDD). The filter was located either at the left or the right of a 2.5 inch dual platter HDD rotating at 7200 rpm. Particles were released from the middle diameter position where four head gimbal assemblies (HGAs) were located. The simulation included airflow and particle trajectories released from any of the four HGAs. The results of this simulation can help determine the efficiency of a circulating filter and its optimal placement.

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