Economic conditions (1) Testing (1) Communication (1) Mark, German (1) Labor market (1) Labor demand (1) Unemployment (1) Technical literature (1) Stone (1) Signals and signaling (1) Postal service (1) Literature (1) Labor supply (1) Working class (1) Employment (Economic theory) (1) Economics (1) Communication of technical information (1) Communication in science (1) Back (1) Management (1) Research (1) Labor productivity (1) Interpretation (Phrasing, dynamics, etc.) (1) Interpretation and construction (1) Forecasting (1) Trabajo--Productividad (1) Ensayos (Tecnología) (1) Mercado de trabajo (1) Señales y señalización (1) Fábricas (1)