Table 2 This table describes the type of attributes we constructed for each potential location in step 2.
From: Unveiling the geography of historical patents in the United States from 1836 to 1975
Variable | Type | Comment |
|---|---|---|
Min. Location | Integer | Candidate Location (CL) first appearance in the document. |
Street | Dummy | 1 if CL is located to the right of the words ‘ST’, ‘AVENUE’, ‘ROAD’, ‘RD’, ‘BLVD’, or ‘AVE’. 0 otherwise. |
City | Dummy | 1 if ‘CITY’ is part of the CL name. |
Frequency | Integer | Number of times the CL was found. |
State | Dummy | 1 if the name of the corresponding state was found. 0 otherwise |
Min. Location State | Integer | State first appearance in the document. |
State Distance | Set of dummy variables | Dummies corresponding to intervals of character distances between CL and the state name. The base category 0 includes also cases where the state name hasn’t been found. |
Countries | Dummy | 1 if the following words appear in the document: ‘GERMANY’, ‘ENGLAND’, ‘FRANCE’, ‘GREAT BRITAIN’, ‘SCOTLAND’, ‘IRELAND’, or ‘CANADA’. O otherwise. |
Country Distance | Dummy | 1 if a country name as specified above is found close to the CL. 0 otherwise. |
Cutoff | Dummy | 1 if the CL or the state has been found after the 50% of the document length. 0 otherwise. |
Substring | Dummy | 1 if the CL is a substring of another CL within the same patent. 0 otherwise. (i.e., York for New York). |
Nchar | Integer | Number of characters of the CL. |
Detected Name | Dummy | 1 if the CL matches any part of the inventor or assignee name. 0 otherwise. |
W State | Dummy | 1 if at least 1 state name has been found for other CL within the same patent document. 0 otherwise. |
Rel. Min. Location | Countinuous | Min Location over the length of the document. Varies between 0 and 1. |
City | Dummy | 1 if the CL was found next to the word ‘CITY’. 0 otherwise. |
County | Dummy | 1 if the CL was found next to the word ‘COUNTY’. 0 otherwise. |
COC | Dummy | 1 if more than one CL of the same county ID co-occur within the same patent document. 0 otherwise. |
WX | Continuous | Index constructed with all the aforementioned variables for ‘competing’ CL within the same patent, as it is usual in spatial settings. |
