Jonas Hjort
Biographic Data
| ID | 1038553 |
|---|---|
| NAME | Jonas Hjort |
| GIVEN NAMES | Jonas |
| FAMILY NAME | Hjort |
| SIGNATURE | HJORT J |
| AFFILIATIONS | University of Oulu |
| ORCID | 0000-0002-4521-2088 |
| VERIFIED | Yes |
| TOTAL WORKS | 11 |
| TOTAL CITATIONS | 12 |
| WORKS AS AUTHOR | 11 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2010 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 2 |
Permafrost degradation amplifies infrastructure-related inequalities across the Qinghai-Tibet Plateau
Strategic or Confused Firms? Evidence from “Missing” Transactions in Uganda
Are firms sophisticated maximizers, or do they appear to make mistakes? Using transaction data from Ugandan value-added tax returns, we show that sellers and buyers report different amounts 79% of the time, despite invoices being easily cross-checked. Our estimates suggest that most firms are “advantageous misreporters,” but that 25% are “disadvantageous misreporters” who systematically overreport own sales minus purchases such that their tax lia…
Strategic or Confused Firms? Evidence from "Missing" Transactions in Uganda
Strategic or Confused Firms? Evidence from "Missing" Transactions in Uganda
Are firms sophisticated maximizers, or do they consistently make errors? Using transaction-level data from Ugandan value-added tax (VAT) returns, we show that sellers and buyers report different amounts 79% of the time, despite invoices being easily cross-checked. We estimate that 25% of firms are disadvantageous misreporters-they systematically misreport own sales and purchases such that their tax liability increases-while 75% are advantageous m…
High potential for loss of permafrost landforms in a changing climate
The presence of ground ice in Arctic soils exerts a major effect on permafrost hydrology and ecology, and factors prominently into geomorphic landform development. As most ground ice has accumulated in near-surface permafrost, it is sensitive to variations in atmospheric conditions. Typical and regionally widespread permafrost landforms such as pingos, ice-wedge polygons, and rock glaciers are closely tied to ground ice. However, under ongoing cl…
Shallow soils are warmer under trees and tall shrubs across Arctic and Boreal ecosystems
Soils are warming as air temperatures rise across the Arctic and Boreal region concurrent with the expansion of tall-statured shrubs and trees in the tundra. Changes in vegetation structure and function are expected to alter soil thermal regimes, thereby modifying climate feedbacks related to permafrost thaw and carbon cycling. However, current understanding of vegetation impacts on soil temperature is limited to local or regional scales and lack…
Vertical Integration, Supplier Behavior, and Quality Upgrading among Exporters
We study the relationship between firms’ output quality and organizational structure. Using data onthe production and transaction chain that makes up Peruvian fishmeal manufacturing, we establish threeresults. First, firms integrate suppliers when the quality premium rises for exogenous reasons. Second,suppliers change their behavior to better maintain input quality when vertically integrated. Third, firmsproduce a highershareof high-quality outp…
The Arrival of Fast Internet and Employment in Africa
To show how fast Internet affects employment in Africa, we exploit the gradual arrival of submarine Internet cables on the coast and maps of the terrestrial cable network. Robust difference-in-differences estimates from 3 datasets, covering 12 countries, show large positive effects on employment rates—also for less educated worker groups—with little or no job displacement across space. The sample-wide impact is driven by increased employment in h…
Ebola, jobs and economic activity in Liberia
BACKGROUND: The 2014 Ebola virus disease (EVD) outbreak in the neighbouring West African countries of Guinea, Liberia and Sierra Leone represents the most significant setback to the region's development in over a decade. This study provides evidence on the extent to which economic activity declined and jobs disappeared in Liberia during the outbreak. METHODS: To estimate how the level of activity and number of jobs in a given set of firms changed…
Ethnic Divisions and Production in Firms
A body of literature suggests that ethnic heterogeneity limits economic growth. This article provides microeconometric evidence on the direct effect of ethnic divisions on productivity. In team production at a plant in Kenya, an upstream worker supplies and distributes flowers to two downstream workers, who assemble them into bunches. The plant uses an essentially random rotation process to assign workers to positions, leading to three types of t…
Pre-colonial culture, post-colonial economic success? The Tswana and the African economic miracle
Cultural explanations of economic phenomena have recently enjoyed a renaissance among economists. This article provides further evidence for the salience of culture through an in-depth case study of one of the fastest-growing economies in the world during the last 50 years-Botswana. The unique culture that developed among the Tswana before and during the early days of colonialism, which shared many features with those of western nation-states, ap…
Pre-colonial culture, post-colonial economic success? The Tswana and the African economic miracle
Cultural explanations of economic phenomena have recently enjoyed a renaissance among economists. This article provides further evidence for the salience of culture through an in-depth case study of one of the fastest-growing economies in the world during the last 50 years-Botswana. The unique culture that developed among the Tswana before and during the early days of colonialism, which shared many features with those of western nation-states, ap…
Vertical Integration, Supplier Behavior, and Quality Upgrading among Exporters
We study the relationship between firms’ output quality and organizational structure. Using data onthe production and transaction chain that makes up Peruvian fishmeal manufacturing, we establish threeresults. First, firms integrate suppliers when the quality premium rises for exogenous reasons. Second,suppliers change their behavior to better maintain input quality when vertically integrated. Third, firmsproduce a highershareof high-quality outp…
Ebola, jobs and economic activity in Liberia
BACKGROUND: The 2014 Ebola virus disease (EVD) outbreak in the neighbouring West African countries of Guinea, Liberia and Sierra Leone represents the most significant setback to the region's development in over a decade. This study provides evidence on the extent to which economic activity declined and jobs disappeared in Liberia during the outbreak. METHODS: To estimate how the level of activity and number of jobs in a given set of firms changed…
Pre-colonial culture, post-colonial economic success? The Tswana and the African economic miracle
Cultural explanations of economic phenomena have recently enjoyed a renaissance among economists. This article provides further evidence for the salience of culture through an in-depth case study of one of the fastest-growing economies in the world during the last 50 years-Botswana. The unique culture that developed among the Tswana before and during the early days of colonialism, which shared many features with those of western nation-states, ap…
Ethnic Divisions and Production in Firms
A body of literature suggests that ethnic heterogeneity limits economic growth. This article provides microeconometric evidence on the direct effect of ethnic divisions on productivity. In team production at a plant in Kenya, an upstream worker supplies and distributes flowers to two downstream workers, who assemble them into bunches. The plant uses an essentially random rotation process to assign workers to positions, leading to three types of t…
Ebola, jobs and economic activity in Liberia
BACKGROUND: The 2014 Ebola virus disease (EVD) outbreak in the neighbouring West African countries of Guinea, Liberia and Sierra Leone represents the most significant setback to the region's development in over a decade. This study provides evidence on the extent to which economic activity declined and jobs disappeared in Liberia during the outbreak. METHODS: To estimate how the level of activity and number of jobs in a given set of firms changed…
The Arrival of Fast Internet and Employment in Africa
To show how fast Internet affects employment in Africa, we exploit the gradual arrival of submarine Internet cables on the coast and maps of the terrestrial cable network. Robust difference-in-differences estimates from 3 datasets, covering 12 countries, show large positive effects on employment rates—also for less educated worker groups—with little or no job displacement across space. The sample-wide impact is driven by increased employment in h…
High potential for loss of permafrost landforms in a changing climate
The presence of ground ice in Arctic soils exerts a major effect on permafrost hydrology and ecology, and factors prominently into geomorphic landform development. As most ground ice has accumulated in near-surface permafrost, it is sensitive to variations in atmospheric conditions. Typical and regionally widespread permafrost landforms such as pingos, ice-wedge polygons, and rock glaciers are closely tied to ground ice. However, under ongoing cl…
Shallow soils are warmer under trees and tall shrubs across Arctic and Boreal ecosystems
Soils are warming as air temperatures rise across the Arctic and Boreal region concurrent with the expansion of tall-statured shrubs and trees in the tundra. Changes in vegetation structure and function are expected to alter soil thermal regimes, thereby modifying climate feedbacks related to permafrost thaw and carbon cycling. However, current understanding of vegetation impacts on soil temperature is limited to local or regional scales and lack…
Vertical Integration, Supplier Behavior, and Quality Upgrading among Exporters
We study the relationship between firms’ output quality and organizational structure. Using data onthe production and transaction chain that makes up Peruvian fishmeal manufacturing, we establish threeresults. First, firms integrate suppliers when the quality premium rises for exogenous reasons. Second,suppliers change their behavior to better maintain input quality when vertically integrated. Third, firmsproduce a highershareof high-quality outp…
Strategic or Confused Firms? Evidence from "Missing" Transactions in Uganda
Strategic or Confused Firms? Evidence from "Missing" Transactions in Uganda
Are firms sophisticated maximizers, or do they consistently make errors? Using transaction-level data from Ugandan value-added tax (VAT) returns, we show that sellers and buyers report different amounts 79% of the time, despite invoices being easily cross-checked. We estimate that 25% of firms are disadvantageous misreporters-they systematically misreport own sales and purchases such that their tax liability increases-while 75% are advantageous m…
Strategic or Confused Firms? Evidence from “Missing” Transactions in Uganda
Are firms sophisticated maximizers, or do they appear to make mistakes? Using transaction data from Ugandan value-added tax returns, we show that sellers and buyers report different amounts 79% of the time, despite invoices being easily cross-checked. Our estimates suggest that most firms are “advantageous misreporters,” but that 25% are “disadvantageous misreporters” who systematically overreport own sales minus purchases such that their tax lia…
Permafrost degradation amplifies infrastructure-related inequalities across the Qinghai-Tibet Plateau
Business (5 works) · Economics (5 works) · Auditing, Earnings Management, Governance (3 works) · Climate change and permafrost (3 works) · Corporate Taxation and Avoidance (3 works) · Economic growth (3 works) · Industrial organization (3 works) · Microeconomics (3 works) · Taxation and Compliance Studies (3 works) · Arctic (2 works)