Shortage. This is the key word of recent years. There is talk everywhere of a lack of energy, of traffic jams in supply chains causing deficiencies of all kinds, from toilet paper to reinforcing steel. But arms and brains are also lacking. Three-quarters of Swiss companies encounter difficulties in finding qualified personnel, which constitutes a risk for growth, a Manpower study pointed out on Friday. However, situations are changing, for good or not, depending on the sector.