takeoff_speed:continuity_of_progress:incomplete_case_studies_of_discontinuous_progress
Differences
This shows you the differences between two versions of the page.
|
|
|
takeoff_speed:continuity_of_progress:incomplete_case_studies_of_discontinuous_progress [2022/09/21 07:37]
127.0.0.1 external edit |
takeoff_speed:continuity_of_progress:incomplete_case_studies_of_discontinuous_progress [2023/05/03 18:48] (current)
jeffreyheninger Fixing $ signs |
| |
| <HTML> | <HTML> |
| <p>Plunkert <a href="http://minerals.usgs.gov/minerals/pubs/commodity/aluminum/050798.pdf">provides a table of historic aluminium prices</a>, according to which the nominal price fell from $8 per pound to $0.58 per pound sometime between 1887 and 1895 (during most of which time no records are available). This period probably captures the innovation of interest, as the Hall–Héroult process was patented in 1886 according to Plunkert, and the price only dropped by $1 per pound during the preceding fifteen years according to her table. Plunkert also says that the price was held artificially low to encourage consumers in the early 1900s, suggesting the same may have been true earlier, however this seems likely to be a small correction.</p> | <p>Plunkert <a href="http://minerals.usgs.gov/minerals/pubs/commodity/aluminum/050798.pdf">provides a table of historic aluminium prices</a>, according to which the nominal price fell from \$8 per pound to \$0.58 per pound sometime between 1887 and 1895 (during most of which time no records are available). This period probably captures the innovation of interest, as the Hall–Héroult process was patented in 1886 according to Plunkert, and the price only dropped by \$1 per pound during the preceding fifteen years according to her table. Plunkert also says that the price was held artificially low to encourage consumers in the early 1900s, suggesting the same may have been true earlier, however this seems likely to be a small correction.</p> |
| </HTML> | </HTML> |
| |
takeoff_speed/continuity_of_progress/incomplete_case_studies_of_discontinuous_progress.txt · Last modified: 2023/05/03 18:48 by jeffreyheninger
